diff options
Diffstat (limited to 'arch/sparc/mm/sun4c.c')
| -rw-r--r-- | arch/sparc/mm/sun4c.c | 2166 |
1 files changed, 0 insertions, 2166 deletions
diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c deleted file mode 100644 index 1cf4f198709a..000000000000 --- a/arch/sparc/mm/sun4c.c +++ /dev/null @@ -1,2166 +0,0 @@ -/* sun4c.c: Doing in software what should be done in hardware. - * - * Copyright (C) 1996 David S. Miller (davem@davemloft.net) - * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) - * Copyright (C) 1996 Andrew Tridgell (Andrew.Tridgell@anu.edu.au) - * Copyright (C) 1997-2000 Anton Blanchard (anton@samba.org) - * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) - */ - -#define NR_TASK_BUCKETS 512 - -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/bootmem.h> -#include <linux/highmem.h> -#include <linux/fs.h> -#include <linux/seq_file.h> -#include <linux/scatterlist.h> -#include <linux/bitmap.h> - -#include <asm/sections.h> -#include <asm/page.h> -#include <asm/pgalloc.h> -#include <asm/pgtable.h> -#include <asm/vaddrs.h> -#include <asm/idprom.h> -#include <asm/machines.h> -#include <asm/memreg.h> -#include <asm/processor.h> -#include <asm/auxio.h> -#include <asm/io.h> -#include <asm/oplib.h> -#include <asm/openprom.h> -#include <asm/mmu_context.h> -#include <asm/highmem.h> -#include <asm/btfixup.h> -#include <asm/cacheflush.h> -#include <asm/tlbflush.h> - -/* Because of our dynamic kernel TLB miss strategy, and how - * our DVMA mapping allocation works, you _MUST_: - * - * 1) Disable interrupts _and_ not touch any dynamic kernel - * memory while messing with kernel MMU state. By - * dynamic memory I mean any object which is not in - * the kernel image itself or a thread_union (both of - * which are locked into the MMU). - * 2) Disable interrupts while messing with user MMU state. - */ - -extern int num_segmaps, num_contexts; - -extern unsigned long page_kernel; - -/* That's it, we prom_halt() on sun4c if the cache size is something other than 65536. - * So let's save some cycles and just use that everywhere except for that bootup - * sanity check. - */ -#define SUN4C_VAC_SIZE 65536 - -#define SUN4C_KERNEL_BUCKETS 32 - -/* Flushing the cache. */ -struct sun4c_vac_props sun4c_vacinfo; -unsigned long sun4c_kernel_faults; - -/* Invalidate every sun4c cache line tag. */ -static void __init sun4c_flush_all(void) -{ - unsigned long begin, end; - - if (sun4c_vacinfo.on) - panic("SUN4C: AIEEE, trying to invalidate vac while it is on."); - - /* Clear 'valid' bit in all cache line tags */ - begin = AC_CACHETAGS; - end = (AC_CACHETAGS + SUN4C_VAC_SIZE); - while (begin < end) { - __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : - "r" (begin), "i" (ASI_CONTROL)); - begin += sun4c_vacinfo.linesize; - } -} - -static void sun4c_flush_context_hw(void) -{ - unsigned long end = SUN4C_VAC_SIZE; - - __asm__ __volatile__( - "1: addcc %0, -4096, %0\n\t" - " bne 1b\n\t" - " sta %%g0, [%0] %2" - : "=&r" (end) - : "0" (end), "i" (ASI_HWFLUSHCONTEXT) - : "cc"); -} - -/* Must be called minimally with IRQs disabled. */ -static void sun4c_flush_segment_hw(unsigned long addr) -{ - if (sun4c_get_segmap(addr) != invalid_segment) { - unsigned long vac_size = SUN4C_VAC_SIZE; - - __asm__ __volatile__( - "1: addcc %0, -4096, %0\n\t" - " bne 1b\n\t" - " sta %%g0, [%2 + %0] %3" - : "=&r" (vac_size) - : "0" (vac_size), "r" (addr), "i" (ASI_HWFLUSHSEG) - : "cc"); - } -} - -/* File local boot time fixups. */ -BTFIXUPDEF_CALL(void, sun4c_flush_page, unsigned long) -BTFIXUPDEF_CALL(void, sun4c_flush_segment, unsigned long) -BTFIXUPDEF_CALL(void, sun4c_flush_context, void) - -#define sun4c_flush_page(addr) BTFIXUP_CALL(sun4c_flush_page)(addr) -#define sun4c_flush_segment(addr) BTFIXUP_CALL(sun4c_flush_segment)(addr) -#define sun4c_flush_context() BTFIXUP_CALL(sun4c_flush_context)() - -/* Must be called minimally with interrupts disabled. */ -static void sun4c_flush_page_hw(unsigned long addr) -{ - addr &= PAGE_MASK; - if ((int)sun4c_get_pte(addr) < 0) - __asm__ __volatile__("sta %%g0, [%0] %1" - : : "r" (addr), "i" (ASI_HWFLUSHPAGE)); -} - -/* Don't inline the software version as it eats too many cache lines if expanded. */ -static void sun4c_flush_context_sw(void) -{ - unsigned long nbytes = SUN4C_VAC_SIZE; - unsigned long lsize = sun4c_vacinfo.linesize; - - __asm__ __volatile__( - "add %2, %2, %%g1\n\t" - "add %2, %%g1, %%g2\n\t" - "add %2, %%g2, %%g3\n\t" - "add %2, %%g3, %%g4\n\t" - "add %2, %%g4, %%g5\n\t" - "add %2, %%g5, %%o4\n\t" - "add %2, %%o4, %%o5\n" - "1:\n\t" - "subcc %0, %%o5, %0\n\t" - "sta %%g0, [%0] %3\n\t" - "sta %%g0, [%0 + %2] %3\n\t" - "sta %%g0, [%0 + %%g1] %3\n\t" - "sta %%g0, [%0 + %%g2] %3\n\t" - "sta %%g0, [%0 + %%g3] %3\n\t" - "sta %%g0, [%0 + %%g4] %3\n\t" - "sta %%g0, [%0 + %%g5] %3\n\t" - "bg 1b\n\t" - " sta %%g0, [%1 + %%o4] %3\n" - : "=&r" (nbytes) - : "0" (nbytes), "r" (lsize), "i" (ASI_FLUSHCTX) - : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc"); -} - -/* Don't inline the software version as it eats too many cache lines if expanded. */ -static void sun4c_flush_segment_sw(unsigned long addr) -{ - if (sun4c_get_segmap(addr) != invalid_segment) { - unsigned long nbytes = SUN4C_VAC_SIZE; - unsigned long lsize = sun4c_vacinfo.linesize; - - __asm__ __volatile__( - "add %2, %2, %%g1\n\t" - "add %2, %%g1, %%g2\n\t" - "add %2, %%g2, %%g3\n\t" - "add %2, %%g3, %%g4\n\t" - "add %2, %%g4, %%g5\n\t" - "add %2, %%g5, %%o4\n\t" - "add %2, %%o4, %%o5\n" - "1:\n\t" - "subcc %1, %%o5, %1\n\t" - "sta %%g0, [%0] %6\n\t" - "sta %%g0, [%0 + %2] %6\n\t" - "sta %%g0, [%0 + %%g1] %6\n\t" - "sta %%g0, [%0 + %%g2] %6\n\t" - "sta %%g0, [%0 + %%g3] %6\n\t" - "sta %%g0, [%0 + %%g4] %6\n\t" - "sta %%g0, [%0 + %%g5] %6\n\t" - "sta %%g0, [%0 + %%o4] %6\n\t" - "bg 1b\n\t" - " add %0, %%o5, %0\n" - : "=&r" (addr), "=&r" (nbytes), "=&r" (lsize) - : "0" (addr), "1" (nbytes), "2" (lsize), - "i" (ASI_FLUSHSEG) - : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc"); - } -} - -/* Don't inline the software version as it eats too many cache lines if expanded. */ -static void sun4c_flush_page_sw(unsigned long addr) -{ - addr &= PAGE_MASK; - if ((sun4c_get_pte(addr) & (_SUN4C_PAGE_NOCACHE | _SUN4C_PAGE_VALID)) == - _SUN4C_PAGE_VALID) { - unsigned long left = PAGE_SIZE; - unsigned long lsize = sun4c_vacinfo.linesize; - - __asm__ __volatile__( - "add %2, %2, %%g1\n\t" - "add %2, %%g1, %%g2\n\t" - "add %2, %%g2, %%g3\n\t" - "add %2, %%g3, %%g4\n\t" - "add %2, %%g4, %%g5\n\t" - "add %2, %%g5, %%o4\n\t" - "add %2, %%o4, %%o5\n" - "1:\n\t" - "subcc %1, %%o5, %1\n\t" - "sta %%g0, [%0] %6\n\t" - "sta %%g0, [%0 + %2] %6\n\t" - "sta %%g0, [%0 + %%g1] %6\n\t" - "sta %%g0, [%0 + %%g2] %6\n\t" - "sta %%g0, [%0 + %%g3] %6\n\t" - "sta %%g0, [%0 + %%g4] %6\n\t" - "sta %%g0, [%0 + %%g5] %6\n\t" - "sta %%g0, [%0 + %%o4] %6\n\t" - "bg 1b\n\t" - " add %0, %%o5, %0\n" - : "=&r" (addr), "=&r" (left), "=&r" (lsize) - : "0" (addr), "1" (left), "2" (lsize), - "i" (ASI_FLUSHPG) - : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc"); - } -} - -/* The sun4c's do have an on chip store buffer. And the way you - * clear them out isn't so obvious. The only way I can think of - * to accomplish this is to read the current context register, - * store the same value there, then read an external hardware - * register. - */ -void sun4c_complete_all_stores(void) -{ - volatile int _unused; - - _unused = sun4c_get_context(); - sun4c_set_context(_unused); - _unused = get_auxio(); -} - -/* Bootup utility functions. */ -static inline void sun4c_init_clean_segmap(unsigned char pseg) -{ - unsigned long vaddr; - - sun4c_put_segmap(0, pseg); - for (vaddr = 0; vaddr < SUN4C_REAL_PGDIR_SIZE; vaddr += PAGE_SIZE) - sun4c_put_pte(vaddr, 0); - sun4c_put_segmap(0, invalid_segment); -} - -static inline void sun4c_init_clean_mmu(unsigned long kernel_end) -{ - unsigned long vaddr; - unsigned char savectx, ctx; - - savectx = sun4c_get_context(); - for (ctx = 0; ctx < num_contexts; ctx++) { - sun4c_set_context(ctx); - for (vaddr = 0; vaddr < 0x20000000; vaddr += SUN4C_REAL_PGDIR_SIZE) - sun4c_put_segmap(vaddr, invalid_segment); - for (vaddr = 0xe0000000; vaddr < KERNBASE; vaddr += SUN4C_REAL_PGDIR_SIZE) - sun4c_put_segmap(vaddr, invalid_segment); - for (vaddr = kernel_end; vaddr < KADB_DEBUGGER_BEGVM; vaddr += SUN4C_REAL_PGDIR_SIZE) - sun4c_put_segmap(vaddr, invalid_segment); - for (vaddr = LINUX_OPPROM_ENDVM; vaddr; vaddr += SUN4C_REAL_PGDIR_SIZE) - sun4c_put_segmap(vaddr, invalid_segment); - } - sun4c_set_context(savectx); -} - -void __init sun4c_probe_vac(void) -{ - sun4c_disable_vac(); - - if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) || - (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) { - /* PROM on SS1 lacks this info, to be super safe we - * hard code it here since this arch is cast in stone. - */ - sun4c_vacinfo.num_bytes = 65536; - sun4c_vacinfo.linesize = 16; - } else { - sun4c_vacinfo.num_bytes = - prom_getintdefault(prom_root_node, "vac-size", 65536); - sun4c_vacinfo.linesize = - prom_getintdefault(prom_root_node, "vac-linesize", 16); - } - sun4c_vacinfo.do_hwflushes = - prom_getintdefault(prom_root_node, "vac-hwflush", 0); - - if (sun4c_vacinfo.do_hwflushes == 0) - sun4c_vacinfo.do_hwflushes = - prom_getintdefault(prom_root_node, "vac_hwflush", 0); - - if (sun4c_vacinfo.num_bytes != 65536) { - prom_printf("WEIRD Sun4C VAC cache size, " - "tell sparclinux@vger.kernel.org"); - prom_halt(); - } - - switch (sun4c_vacinfo.linesize) { - case 16: - sun4c_vacinfo.log2lsize = 4; - break; - case 32: - sun4c_vacinfo.log2lsize = 5; - break; - default: - prom_printf("probe_vac: Didn't expect vac-linesize of %d, halting\n", - sun4c_vacinfo.linesize); - prom_halt(); - } - - sun4c_flush_all(); - sun4c_enable_vac(); -} - -/* Patch instructions for the low level kernel fault handler. */ -extern unsigned long invalid_segment_patch1, invalid_segment_patch1_ff; -extern unsigned long invalid_segment_patch2, invalid_segment_patch2_ff; -extern unsigned long invalid_segment_patch1_1ff, invalid_segment_patch2_1ff; -extern unsigned long num_context_patch1, num_context_patch1_16; -extern unsigned long num_context_patch2_16; -extern unsigned long vac_linesize_patch, vac_linesize_patch_32; -extern unsigned long vac_hwflush_patch1, vac_hwflush_patch1_on; -extern unsigned long vac_hwflush_patch2, vac_hwflush_patch2_on; - -#define PATCH_INSN(src, dst) do { \ - daddr = &(dst); \ - iaddr = &(src); \ - *daddr = *iaddr; \ - } while (0) - -static void __init patch_kernel_fault_handler(void) -{ - unsigned long *iaddr, *daddr; - - switch (num_segmaps) { - case 128: - /* Default, nothing to do. */ - break; - case 256: - PATCH_INSN(invalid_segment_patch1_ff, - invalid_segment_patch1); - PATCH_INSN(invalid_segment_patch2_ff, - invalid_segment_patch2); - break; - case 512: - PATCH_INSN(invalid_segment_patch1_1ff, - invalid_segment_patch1); - PATCH_INSN(invalid_segment_patch2_1ff, - invalid_segment_patch2); - break; - default: - prom_printf("Unhandled number of segmaps: %d\n", - num_segmaps); - prom_halt(); - } - switch (num_contexts) { - case 8: - /* Default, nothing to do. */ - break; - case 16: - PATCH_INSN(num_context_patch1_16, - num_context_patch1); - break; - default: - prom_printf("Unhandled number of contexts: %d\n", - num_contexts); - prom_halt(); - } - - if (sun4c_vacinfo.do_hwflushes != 0) { - PATCH_INSN(vac_hwflush_patch1_on, vac_hwflush_patch1); - PATCH_INSN(vac_hwflush_patch2_on, vac_hwflush_patch2); - } else { - switch (sun4c_vacinfo.linesize) { - case 16: - /* Default, nothing to do. */ - break; - case 32: - PATCH_INSN(vac_linesize_patch_32, vac_linesize_patch); - break; - default: - prom_printf("Impossible VAC linesize %d, halting...\n", - sun4c_vacinfo.linesize); - prom_halt(); - } - } -} - -static void __init sun4c_probe_mmu(void) -{ - if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) || - (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) { - /* Hardcode these just to be safe, PROM on SS1 does - * not have this info available in the root node. - */ - num_segmaps = 128; - num_contexts = 8; - } else { - num_segmaps = - prom_getintdefault(prom_root_node, "mmu-npmg", 128); - num_contexts = - prom_getintdefault(prom_root_node, "mmu-nctx", 0x8); - } - patch_kernel_fault_handler(); -} - -volatile unsigned long __iomem *sun4c_memerr_reg = NULL; - -void __init sun4c_probe_memerr_reg(void) -{ - phandle node; - struct linux_prom_registers regs[1]; - - node = prom_getchild(prom_root_node); - node = prom_searchsiblings(prom_root_node, "memory-error"); - if (!node) - return; - if (prom_getproperty(node, "reg", (char *)regs, sizeof(regs)) <= 0) - return; - /* hmm I think regs[0].which_io is zero here anyways */ - sun4c_memerr_reg = ioremap(regs[0].phys_addr, regs[0].reg_size); -} - -static inline void sun4c_init_ss2_cache_bug(void) -{ - if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS2)) || - (idprom->id_machtype == (SM_SUN4C | SM_4C_IPX)) || - (idprom->id_machtype == (SM_SUN4C | SM_4C_ELC))) { - /* Whee.. */ - printk("SS2 cache bug detected, uncaching trap table page\n"); - sun4c_flush_page((unsigned int) &_start); - sun4c_put_pte(((unsigned long) &_start), - (sun4c_get_pte((unsigned long) &_start) | _SUN4C_PAGE_NOCACHE)); - } -} - -/* Addr is always aligned on a page boundary for us already. */ -static int sun4c_map_dma_area(struct device *dev, dma_addr_t *pba, unsigned long va, - unsigned long addr, int len) -{ - unsigned long page, end; - - *pba = addr; - - end = PAGE_ALIGN((addr + len)); - while (addr < end) { - page = va; - sun4c_flush_page(page); - page -= PAGE_OFFSET; - page >>= PAGE_SHIFT; - page |= (_SUN4C_PAGE_VALID | _SUN4C_PAGE_DIRTY | - _SUN4C_PAGE_NOCACHE | _SUN4C_PAGE_PRIV); - sun4c_put_pte(addr, page); - addr += PAGE_SIZE; - va += PAGE_SIZE; - } - - return 0; -} - -static void sun4c_unmap_dma_area(struct device *dev, unsigned long busa, int len) -{ - /* Fortunately for us, bus_addr == uncached_virt in sun4c. */ - /* XXX Implement this */ -} - -/* TLB management. */ - -/* Don't change this struct without changing entry.S. This is used - * in the in-window kernel fault handler, and you don't want to mess - * with that. (See sun4c_fault in entry.S). - */ -struct sun4c_mmu_entry { - struct sun4c_mmu_entry *next; - struct sun4c_mmu_entry *prev; - unsigned long vaddr; - unsigned char pseg; - unsigned char locked; - - /* For user mappings only, and completely hidden from kernel - * TLB miss code. - */ - unsigned char ctx; - struct sun4c_mmu_entry *lru_next; - struct sun4c_mmu_entry *lru_prev; -}; - -static struct sun4c_mmu_entry mmu_entry_pool[SUN4C_MAX_SEGMAPS]; - -static void __init sun4c_init_mmu_entry_pool(void) -{ - int i; - - for (i=0; i < SUN4C_MAX_SEGMAPS; i++) { - mmu_entry_pool[i].pseg = i; - mmu_entry_pool[i].next = NULL; - mmu_entry_pool[i].prev = NULL; - mmu_entry_pool[i].vaddr = 0; - mmu_entry_pool[i].locked = 0; - mmu_entry_pool[i].ctx = 0; - mmu_entry_pool[i].lru_next = NULL; - mmu_entry_pool[i].lru_prev = NULL; - } - mmu_entry_pool[invalid_segment].locked = 1; -} - -static inline void fix_permissions(unsigned long vaddr, unsigned long bits_on, - unsigned long bits_off) -{ - unsigned long start, end; - - end = vaddr + SUN4C_REAL_PGDIR_SIZE; - for (start = vaddr; start < end; start += PAGE_SIZE) - if (sun4c_get_pte(start) & _SUN4C_PAGE_VALID) - sun4c_put_pte(start, (sun4c_get_pte(start) | bits_on) & - ~bits_off); -} - -static inline void sun4c_init_map_kernelprom(unsigned long kernel_end) -{ - unsigned long vaddr; - unsigned char pseg, ctx; - - for (vaddr = KADB_DEBUGGER_BEGVM; - vaddr < LINUX_OPPROM_ENDVM; - vaddr += SUN4C_REAL_PGDIR_SIZE) { - pseg = sun4c_get_segmap(vaddr); - if (pseg != invalid_segment) { - mmu_entry_pool[pseg].locked = 1; - for (ctx = 0; ctx < num_contexts; ctx++) - prom_putsegment(ctx, vaddr, pseg); - fix_permissions(vaddr, _SUN4C_PAGE_PRIV, 0); - } - } - - for (vaddr = KERNBASE; vaddr < kernel_end; vaddr += SUN4C_REAL_PGDIR_SIZE) { - pseg = sun4c_get_segmap(vaddr); - mmu_entry_pool[pseg].locked = 1; - for (ctx = 0; ctx < num_contexts; ctx++) - prom_putsegment(ctx, vaddr, pseg); - fix_permissions(vaddr, _SUN4C_PAGE_PRIV, _SUN4C_PAGE_NOCACHE); - } -} - -static void __init sun4c_init_lock_area(unsigned long start, unsigned long end) -{ - int i, ctx; - - while (start < end) { - for (i = 0; i < invalid_segment; i++) - if (!mmu_entry_pool[i].locked) - break; - mmu_entry_pool[i].locked = 1; - sun4c_init_clean_segmap(i); - for (ctx = 0; ctx < num_contexts; ctx++) - prom_putsegment(ctx, start, mmu_entry_pool[i].pseg); - start += SUN4C_REAL_PGDIR_SIZE; - } -} - -/* Don't change this struct without changing entry.S. This is used - * in the in-window kernel fault handler, and you don't want to mess - * with that. (See sun4c_fault in entry.S). - */ -struct sun4c_mmu_ring { - struct sun4c_mmu_entry ringhd; - int num_entries; -}; - -static struct sun4c_mmu_ring sun4c_context_ring[SUN4C_MAX_CONTEXTS]; /* used user entries */ -static struct sun4c_mmu_ring sun4c_ufree_ring; /* free user entries */ -static struct sun4c_mmu_ring sun4c_ulru_ring; /* LRU user entries */ -struct sun4c_mmu_ring sun4c_kernel_ring; /* used kernel entries */ -struct sun4c_mmu_ring sun4c_kfree_ring; /* free kernel entries */ - -static inline void sun4c_init_rings(void) -{ - int i; - - for (i = 0; i < SUN4C_MAX_CONTEXTS; i++) { - sun4c_context_ring[i].ringhd.next = - sun4c_context_ring[i].ringhd.prev = - &sun4c_context_ring[i].ringhd; - sun4c_context_ring[i].num_entries = 0; - } - sun4c_ufree_ring.ringhd.next = sun4c_ufree_ring.ringhd.prev = - &sun4c_ufree_ring.ringhd; - sun4c_ufree_ring.num_entries = 0; - sun4c_ulru_ring.ringhd.lru_next = sun4c_ulru_ring.ringhd.lru_prev = - &sun4c_ulru_ring.ringhd; - sun4c_ulru_ring.num_entries = 0; - sun4c_kernel_ring.ringhd.next = sun4c_kernel_ring.ringhd.prev = - &sun4c_kernel_ring.ringhd; - sun4c_kernel_ring.num_entries = 0; - sun4c_kfree_ring.ringhd.next = sun4c_kfree_ring.ringhd.prev = - &sun4c_kfree_ring.ringhd; - sun4c_kfree_ring.num_entries = 0; -} - -static void add_ring(struct sun4c_mmu_ring *ring, - struct sun4c_mmu_entry *entry) -{ - struct sun4c_mmu_entry *head = &ring->ringhd; - - entry->prev = head; - (entry->next = head->next)->prev = entry; - head->next = entry; - ring->num_entries++; -} - -static inline void add_lru(struct sun4c_mmu_entry *entry) -{ - struct sun4c_mmu_ring *ring = &sun4c_ulru_ring; - struct sun4c_mmu_entry *head = &ring->ringhd; - - entry->lru_next = head; - (entry->lru_prev = head->lru_prev)->lru_next = entry; - head->lru_prev = entry; -} - -static void add_ring_ordered(struct sun4c_mmu_ring *ring, - struct sun4c_mmu_entry *entry) -{ - struct sun4c_mmu_entry *head = &ring->ringhd; - unsigned long addr = entry->vaddr; - - while ((head->next != &ring->ringhd) && (head->next->vaddr < addr)) - head = head->next; - - entry->prev = head; - (entry->next = head->next)->prev = entry; - head->next = entry; - ring->num_entries++; - - add_lru(entry); -} - -static inline void remove_ring(struct sun4c_mmu_ring *ring, - struct sun4c_mmu_entry *entry) -{ - struct sun4c_mmu_entry *next = entry->next; - - (next->prev = entry->prev)->next = next; - ring->num_entries--; -} - -static void remove_lru(struct sun4c_mmu_entry *entry) -{ - struct sun4c_mmu_entry *next = entry->lru_next; - - (next->lru_prev = entry->lru_prev)->lru_next = next; -} - -static void free_user_entry(int ctx, struct sun4c_mmu_entry *entry) -{ - remove_ring(sun4c_context_ring+ctx, entry); - remove_lru(entry); - add_ring(&sun4c_ufree_ring, entry); -} - -static void free_kernel_entry(struct sun4c_mmu_entry *entry, - struct sun4c_mmu_ring *ring) -{ - remove_ring(ring, entry); - add_ring(&sun4c_kfree_ring, entry); -} - -static void __init sun4c_init_fill_kernel_ring(int howmany) -{ - int i; - - while (howmany) { - for (i = 0; i < invalid_segment; i++) - if (!mmu_entry_pool[i].locked) - break; - mmu_entry_pool[i].locked = 1; - sun4c_init_clean_segmap(i); - add_ring(&sun4c_kfree_ring, &mmu_entry_pool[i]); - howmany--; - } -} - -static void __init sun4c_init_fill_user_ring(void) -{ - int i; - - for (i = 0; i < invalid_segment; i++) { - if (mmu_entry_pool[i].locked) - continue; - sun4c_init_clean_segmap(i); - add_ring(&sun4c_ufree_ring, &mmu_entry_pool[i]); - } -} - -static void sun4c_kernel_unmap(struct sun4c_mmu_entry *kentry) -{ - int savectx, ctx; - - savectx = sun4c_get_context(); - for (ctx = 0; ctx < num_contexts; ctx++) { - sun4c_set_context(ctx); - sun4c_put_segmap(kentry->vaddr, invalid_segment); - } - sun4c_set_context(savectx); -} - -static void sun4c_kernel_map(struct sun4c_mmu_entry *kentry) -{ - int savectx, ctx; - - savectx = sun4c_get_context(); - for (ctx = 0; ctx < num_contexts; ctx++) { - sun4c_set_context(ctx); - sun4c_put_segmap(kentry->vaddr, kentry->pseg); - } - sun4c_set_context(savectx); -} - -#define sun4c_user_unmap(__entry) \ - sun4c_put_segmap((__entry)->vaddr, invalid_segment) - -static void sun4c_demap_context(struct sun4c_mmu_ring *crp, unsigned char ctx) -{ - struct sun4c_mmu_entry *head = &crp->ringhd; - unsigned long flags; - - local_irq_save(flags); - if (head->next != head) { - struct sun4c_mmu_entry *entry = head->next; - int savectx = sun4c_get_context(); - - flush_user_windows(); - sun4c_set_context(ctx); - sun4c_flush_context(); - do { - struct sun4c_mmu_entry *next = entry->next; - - sun4c_user_unmap(entry); - free_user_entry(ctx, entry); - - entry = next; - } while (entry != head); - sun4c_set_context(savectx); - } - local_irq_restore(flags); -} - -static int sun4c_user_taken_entries; /* This is how much we have. */ -static int max_user_taken_entries; /* This limits us and prevents deadlock. */ - -static struct sun4c_mmu_entry *sun4c_kernel_strategy(void) -{ - struct sun4c_mmu_entry *this_entry; - - /* If some are free, return first one. */ - if (sun4c_kfree_ring.num_entries) { - this_entry = sun4c_kfree_ring.ringhd.next; - return this_entry; - } - - /* Else free one up. */ - this_entry = sun4c_kernel_ring.ringhd.prev; - sun4c_flush_segment(this_entry->vaddr); - sun4c_kernel_unmap(this_entry); - free_kernel_entry(this_entry, &sun4c_kernel_ring); - this_entry = sun4c_kfree_ring.ringhd.next; - - return this_entry; -} - -/* Using this method to free up mmu entries eliminates a lot of - * potential races since we have a kernel that incurs tlb - * replacement faults. There may be performance penalties. - * - * NOTE: Must be called with interrupts disabled. - */ -static struct sun4c_mmu_entry *sun4c_user_strategy(void) -{ - struct sun4c_mmu_entry *entry; - unsigned char ctx; - int savectx; - - /* If some are free, return first one. */ - if (sun4c_ufree_ring.num_entries) { - entry = sun4c_ufree_ring.ringhd.next; - goto unlink_out; - } - - if (sun4c_user_taken_entries) { - entry = sun4c_kernel_strategy(); - sun4c_user_taken_entries--; - goto kunlink_out; - } - - /* Grab from the beginning of the LRU list. */ - entry = sun4c_ulru_ring.ringhd.lru_next; - ctx = entry->ctx; - - savectx = sun4c_get_context(); - flush_user_windows(); - sun4c_set_context(ctx); - sun4c_flush_segment(entry->vaddr); - sun4c_user_unmap(entry); - remove_ring(sun4c_context_ring + ctx, entry); - remove_lru(entry); - sun4c_set_context(savectx); - - return entry; - -unlink_out: - remove_ring(&sun4c_ufree_ring, entry); - return entry; -kunlink_out: - remove_ring(&sun4c_kfree_ring, entry); - return entry; -} - -/* NOTE: Must be called with interrupts disabled. */ -void sun4c_grow_kernel_ring(void) -{ - struct sun4c_mmu_entry *entry; - - /* Prevent deadlock condition. */ - if (sun4c_user_taken_entries >= max_user_taken_entries) - return; - - if (sun4c_ufree_ring.num_entries) { - entry = sun4c_ufree_ring.ringhd.next; - remove_ring(&sun4c_ufree_ring, entry); - add_ring(&sun4c_kfree_ring, entry); - sun4c_user_taken_entries++; - } -} - -/* 2 page buckets for task struct and kernel stack allocation. - * - * TASK_STACK_BEGIN - * bucket[0] - * bucket[1] - * [ ... ] - * bucket[NR_TASK_BUCKETS-1] - * TASK_STACK_BEGIN + (sizeof(struct task_bucket) * NR_TASK_BUCKETS) - * - * Each slot looks like: - * - * page 1 -- task struct + beginning of kernel stack - * page 2 -- rest of kernel stack - */ - -union task_union *sun4c_bucket[NR_TASK_BUCKETS]; - -static int sun4c_lowbucket_avail; - -#define BUCKET_EMPTY ((union task_union *) 0) -#define BUCKET_SHIFT (PAGE_SHIFT + 1) /* log2(sizeof(struct task_bucket)) */ -#define BUCKET_SIZE (1 << BUCKET_SHIFT) -#define BUCKET_NUM(addr) ((((addr) - SUN4C_LOCK_VADDR) >> BUCKET_SHIFT)) -#define BUCKET_ADDR(num) (((num) << BUCKET_SHIFT) + SUN4C_LOCK_VADDR) -#define BUCKET_PTE(page) \ - ((((page) - PAGE_OFFSET) >> PAGE_SHIFT) | pgprot_val(SUN4C_PAGE_KERNEL)) -#define BUCKET_PTE_PAGE(pte) \ - (PAGE_OFFSET + (((pte) & SUN4C_PFN_MASK) << PAGE_SHIFT)) - -static void get_locked_segment(unsigned long addr) -{ - struct sun4c_mmu_entry *stolen; - unsigned long flags; - - local_irq_save(flags); - addr &= SUN4C_REAL_PGDIR_MASK; - stolen = sun4c_user_strategy(); - max_user_taken_entries--; - stolen->vaddr = addr; - flush_user_windows(); - sun4c_kernel_map(stolen); - local_irq_restore(flags); -} - -static void free_locked_segment(unsigned long addr) -{ - struct sun4c_mmu_entry *entry; - unsigned long flags; - unsigned char pseg; - - local_irq_save(flags); - addr &= SUN4C_REAL_PGDIR_MASK; - pseg = sun4c_get_segmap(addr); - entry = &mmu_entry_pool[pseg]; - - flush_user_windows(); - sun4c_flush_segment(addr); - sun4c_kernel_unmap(entry); - add_ring(&sun4c_ufree_ring, entry); - max_user_taken_entries++; - local_irq_restore(flags); -} - -static inline void garbage_collect(int entry) -{ - int start, end; - - /* 32 buckets per segment... */ - entry &= ~31; - start = entry; - for (end = (start + 32); start < end; start++) - if (sun4c_bucket[start] != BUCKET_EMPTY) - return; - - /* Entire segment empty, release it. */ - free_locked_segment(BUCKET_ADDR(entry)); -} - -static struct thread_info *sun4c_alloc_thread_info_node(int node) -{ - unsigned long addr, pages; - int entry; - - pages = __get_free_pages(GFP_KERNEL, THREAD_INFO_ORDER); - if (!pages) - return NULL; - - for (entry = sun4c_lowbucket_avail; entry < NR_TASK_BUCKETS; entry++) - if (sun4c_bucket[entry] == BUCKET_EMPTY) - break; - if (entry == NR_TASK_BUCKETS) { - free_pages(pages, THREAD_INFO_ORDER); - return NULL; - } - if (entry >= sun4c_lowbucket_avail) - sun4c_lowbucket_avail = entry + 1; - - addr = BUCKET_ADDR(entry); - sun4c_bucket[entry] = (union task_union *) addr; - if(sun4c_get_segmap(addr) == invalid_segment) - get_locked_segment(addr); - - /* We are changing the virtual color of the page(s) - * so we must flush the cache to guarantee consistency. - */ - sun4c_flush_page(pages); - sun4c_flush_page(pages + PAGE_SIZE); - - sun4c_put_pte(addr, BUCKET_PTE(pages)); - sun4c_put_pte(addr + PAGE_SIZE, BUCKET_PTE(pages + PAGE_SIZE)); - -#ifdef CONFIG_DEBUG_STACK_USAGE - memset((void *)addr, 0, PAGE_SIZE << THREAD_INFO_ORDER); -#endif /* DEBUG_STACK_USAGE */ - - return (struct thread_info *) addr; -} - -static void sun4c_free_thread_info(struct thread_info *ti) -{ - unsigned long tiaddr = (unsigned long) ti; - unsigned long pages = BUCKET_PTE_PAGE(sun4c_get_pte(tiaddr)); - int entry = BUCKET_NUM(tiaddr); - - /* We are deleting a mapping, so the flush here is mandatory. */ - sun4c_flush_page(tiaddr); - sun4c_flush_page(tiaddr + PAGE_SIZE); - - sun4c_put_pte(tiaddr, 0); - sun4c_put_pte(tiaddr + PAGE_SIZE, 0); - - sun4c_bucket[entry] = BUCKET_EMPTY; - if (entry < sun4c_lowbucket_avail) - sun4c_lowbucket_avail = entry; - - free_pages(pages, THREAD_INFO_ORDER); - garbage_collect(entry); -} - -static void __init sun4c_init_buckets(void) -{ - int entry; - - if (sizeof(union thread_union) != (PAGE_SIZE << THREAD_INFO_ORDER)) { - extern void thread_info_size_is_bolixed_pete(void); - thread_info_size_is_bolixed_pete(); - } - - for (entry = 0; entry < NR_TASK_BUCKETS; entry++) - sun4c_bucket[entry] = BUCKET_EMPTY; - sun4c_lowbucket_avail = 0; -} - -static unsigned long sun4c_iobuffer_start; -static unsigned long sun4c_iobuffer_end; -static unsigned long sun4c_iobuffer_high; -static unsigned long *sun4c_iobuffer_map; -static int iobuffer_map_size; - -/* - * Alias our pages so they do not cause a trap. - * Also one page may be aliased into several I/O areas and we may - * finish these I/O separately. - */ -static char *sun4c_lockarea(char *vaddr, unsigned long size) -{ - unsigned long base, scan; - unsigned long npages; - unsigned long vpage; - unsigned long pte; - unsigned long apage; - unsigned long high; - unsigned long flags; - - npages = (((unsigned long)vaddr & ~PAGE_MASK) + - size + (PAGE_SIZE-1)) >> PAGE_SHIFT; - - local_irq_save(flags); - base = bitmap_find_next_zero_area(sun4c_iobuffer_map, iobuffer_map_size, - 0, npages, 0); - if (base >= iobuffer_map_size) - goto abend; - - high = ((base + npages) << PAGE_SHIFT) + sun4c_iobuffer_start; - high = SUN4C_REAL_PGDIR_ALIGN(high); - while (high > sun4c_iobuffer_high) { - get_locked_segment(sun4c_iobuffer_high); - sun4c_iobuffer_high += SUN4C_REAL_PGDIR_SIZE; - } - - vpage = ((unsigned long) vaddr) & PAGE_MASK; - for (scan = base; scan < base+npages; scan++) { - pte = ((vpage-PAGE_OFFSET) >> PAGE_SHIFT); - pte |= pgprot_val(SUN4C_PAGE_KERNEL); - pte |= _SUN4C_PAGE_NOCACHE; - set_bit(scan, sun4c_iobuffer_map); - apage = (scan << PAGE_SHIFT) + sun4c_iobuffer_start; - - /* Flush original mapping so we see the right things later. */ - sun4c_flush_page(vpage); - - sun4c_put_pte(apage, pte); - vpage += PAGE_SIZE; - } - local_irq_restore(flags); - return (char *) ((base << PAGE_SHIFT) + sun4c_iobuffer_start + - (((unsigned long) vaddr) & ~PAGE_MASK)); - -abend: - local_irq_restore(flags); - printk("DMA vaddr=0x%p size=%08lx\n", vaddr, size); - panic("Out of iobuffer table"); - return NULL; -} - -static void sun4c_unlockarea(char *vaddr, unsigned long size) -{ - unsigned long vpage, npages; - unsigned long flags; - int scan, high; - - vpage = (unsigned long)vaddr & PAGE_MASK; - npages = (((unsigned long)vaddr & ~PAGE_MASK) + - size + (PAGE_SIZE-1)) >> PAGE_SHIFT; - - local_irq_save(flags); - while (npages != 0) { - --npages; - - /* This mapping is marked non-cachable, no flush necessary. */ - sun4c_put_pte(vpage, 0); - clear_bit((vpage - sun4c_iobuffer_start) >> PAGE_SHIFT, - sun4c_iobuffer_map); - vpage += PAGE_SIZE; - } - - /* garbage collect */ - scan = (sun4c_iobuffer_high - sun4c_iobuffer_start) >> PAGE_SHIFT; - while (scan >= 0 && !sun4c_iobuffer_map[scan >> 5]) - scan -= 32; - scan += 32; - high = sun4c_iobuffer_start + (scan << PAGE_SHIFT); - high = SUN4C_REAL_PGDIR_ALIGN(high) + SUN4C_REAL_PGDIR_SIZE; - while (high < sun4c_iobuffer_high) { - sun4c_iobuffer_high -= SUN4C_REAL_PGDIR_SIZE; - free_locked_segment(sun4c_iobuffer_high); - } - local_irq_restore(flags); -} - -/* Note the scsi code at init time passes to here buffers - * which sit on the kernel stack, those are already locked - * by implication and fool the page locking code above - * if passed to by mistake. - */ -static __u32 sun4c_get_scsi_one(struct device *dev, char *bufptr, unsigned long len) -{ - unsigned long page; - - page = ((unsigned long)bufptr) & PAGE_MASK; - if (!virt_addr_valid(page)) { - sun4c_flush_page(page); - return (__u32)bufptr; /* already locked */ - } - return (__u32)sun4c_lockarea(bufptr, len); -} - -static void sun4c_get_scsi_sgl(struct device *dev, struct scatterlist *sg, int sz) -{ - while (sz != 0) { - --sz; - sg->dma_address = (__u32)sun4c_lockarea(sg_virt(sg), sg->length); - sg->dma_length = sg->length; - sg = sg_next(sg); - } -} - -static void sun4c_release_scsi_one(struct device *dev, __u32 bufptr, unsigned long len) -{ - if (bufptr < sun4c_iobuffer_start) - return; /* On kernel stack or similar, see above */ - sun4c_unlockarea((char *)bufptr, len); -} - -static void sun4c_release_scsi_sgl(struct device *dev, struct scatterlist *sg, int sz) -{ - while (sz != 0) { - --sz; - sun4c_unlockarea((char *)sg->dma_address, sg->length); - sg = sg_next(sg); - } -} - -#define TASK_ENTRY_SIZE BUCKET_SIZE /* see above */ -#define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1)) - -struct vm_area_struct sun4c_kstack_vma; - -static void __init sun4c_init_lock_areas(void) -{ - unsigned long sun4c_taskstack_start; - unsigned long sun4c_taskstack_end; - int bitmap_size; - - sun4c_init_buckets(); - sun4c_taskstack_start = SUN4C_LOCK_VADDR; - sun4c_taskstack_end = (sun4c_taskstack_start + - (TASK_ENTRY_SIZE * NR_TASK_BUCKETS)); - if (sun4c_taskstack_end >= SUN4C_LOCK_END) { - prom_printf("Too many tasks, decrease NR_TASK_BUCKETS please.\n"); - prom_halt(); - } - - sun4c_iobuffer_start = sun4c_iobuffer_high = - SUN4C_REAL_PGDIR_ALIGN(sun4c_taskstack_end); - sun4c_iobuffer_end = SUN4C_LOCK_END; - bitmap_size = (sun4c_iobuffer_end - sun4c_iobuffer_start) >> PAGE_SHIFT; - bitmap_size = (bitmap_size + 7) >> 3; - bitmap_size = LONG_ALIGN(bitmap_size); - iobuffer_map_size = bitmap_size << 3; - sun4c_iobuffer_map = __alloc_bootmem(bitmap_size, SMP_CACHE_BYTES, 0UL); - memset((void *) sun4c_iobuffer_map, 0, bitmap_size); - - sun4c_kstack_vma.vm_mm = &init_mm; - sun4c_kstack_vma.vm_start = sun4c_taskstack_start; - sun4c_kstack_vma.vm_end = sun4c_taskstack_end; - sun4c_kstack_vma.vm_page_prot = PAGE_SHARED; - sun4c_kstack_vma.vm_flags = VM_READ | VM_WRITE | VM_EXEC; - insert_vm_struct(&init_mm, &sun4c_kstack_vma); -} - -/* Cache flushing on the sun4c. */ -static void sun4c_flush_cache_all(void) -{ - unsigned long begin, end; - - flush_user_windows(); - begin = (KERNBASE + SUN4C_REAL_PGDIR_SIZE); - end = (begin + SUN4C_VAC_SIZE); - - if (sun4c_vacinfo.linesize == 32) { - while (begin < end) { - __asm__ __volatile__( - "ld [%0 + 0x00], %%g0\n\t" - "ld [%0 + 0x20], %%g0\n\t" - "ld [%0 + 0x40], %%g0\n\t" - "ld [%0 + 0x60], %%g0\n\t" - "ld [%0 + 0x80], %%g0\n\t" - "ld [%0 + 0xa0], %%g0\n\t" - "ld [%0 + 0xc0], %%g0\n\t" - "ld [%0 + 0xe0], %%g0\n\t" - "ld [%0 + 0x100], %%g0\n\t" - "ld [%0 + 0x120], %%g0\n\t" - "ld [%0 + 0x140], %%g0\n\t" - "ld [%0 + 0x160], %%g0\n\t" - "ld [%0 + 0x180], %%g0\n\t" - "ld [%0 + 0x1a0], %%g0\n\t" - "ld [%0 + 0x1c0], %%g0\n\t" - "ld [%0 + 0x1e0], %%g0\n" - : : "r" (begin)); - begin += 512; - } - } else { - while (begin < end) { - __asm__ __volatile__( - "ld [%0 + 0x00], %%g0\n\t" - "ld [%0 + 0x10], %%g0\n\t" - "ld [%0 + 0x20], %%g0\n\t" - "ld [%0 + 0x30], %%g0\n\t" - "ld [%0 + 0x40], %%g0\n\t" - "ld [%0 + 0x50], %%g0\n\t" - "ld [%0 + 0x60], %%g0\n\t" - "ld [%0 + 0x70], %%g0\n\t" - "ld [%0 + 0x80], %%g0\n\t" - "ld [%0 + 0x90], %%g0\n\t" - "ld [%0 + 0xa0], %%g0\n\t" - "ld [%0 + 0xb0], %%g0\n\t" - "ld [%0 + 0xc0], %%g0\n\t" - "ld [%0 + 0xd0], %%g0\n\t" - "ld [%0 + 0xe0], %%g0\n\t" - "ld [%0 + 0xf0], %%g0\n" - : : "r" (begin)); - begin += 256; - } - } -} - -static void sun4c_flush_cache_mm(struct mm_struct *mm) -{ - int new_ctx = mm->context; - - if (new_ctx != NO_CONTEXT) { - flush_user_windows(); - - if (sun4c_context_ring[new_ctx].num_entries) { - struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; - unsigned long flags; - - local_irq_save(flags); - if (head->next != head) { - struct sun4c_mmu_entry *entry = head->next; - int savectx = sun4c_get_context(); - - sun4c_set_context(new_ctx); - sun4c_flush_context(); - do { - struct sun4c_mmu_entry *next = entry->next; - - sun4c_user_unmap(entry); - free_user_entry(new_ctx, entry); - - entry = next; - } while (entry != head); - sun4c_set_context(savectx); - } - local_irq_restore(flags); - } - } -} - -static void sun4c_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) -{ - struct mm_struct *mm = vma->vm_mm; - int new_ctx = mm->context; - - if (new_ctx != NO_CONTEXT) { - struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; - struct sun4c_mmu_entry *entry; - unsigned long flags; - - flush_user_windows(); - - local_irq_save(flags); - /* All user segmap chains are ordered on entry->vaddr. */ - for (entry = head->next; - (entry != head) && ((entry->vaddr+SUN4C_REAL_PGDIR_SIZE) < start); - entry = entry->next) - ; - - /* Tracing various job mixtures showed that this conditional - * only passes ~35% of the time for most worse case situations, - * therefore we avoid all of this gross overhead ~65% of the time. - */ - if ((entry != head) && (entry->vaddr < end)) { - int octx = sun4c_get_context(); - sun4c_set_context(new_ctx); - - /* At this point, always, (start >= entry->vaddr) and - * (entry->vaddr < end), once the latter condition - * ceases to hold, or we hit the end of the list, we - * exit the loop. The ordering of all user allocated - * segmaps makes this all work out so beautifully. - */ - do { - struct sun4c_mmu_entry *next = entry->next; - unsigned long realend; - - /* "realstart" is always >= entry->vaddr */ - realend = entry->vaddr + SUN4C_REAL_PGDIR_SIZE; - if (end < realend) - realend = end; - if ((realend - entry->vaddr) <= (PAGE_SIZE << 3)) { - unsigned long page = entry->vaddr; - while (page < realend) { - sun4c_flush_page(page); - page += PAGE_SIZE; - } - } else { - sun4c_flush_segment(entry->vaddr); - sun4c_user_unmap(entry); - free_user_entry(new_ctx, entry); - } - entry = next; - } while ((entry != head) && (entry->vaddr < end)); - sun4c_set_context(octx); - } - local_irq_restore(flags); - } -} - -static void sun4c_flush_cache_page(struct vm_area_struct *vma, unsigned long page) -{ - struct mm_struct *mm = vma->vm_mm; - int new_ctx = mm->context; - - /* Sun4c has no separate I/D caches so cannot optimize for non - * text page flushes. - */ - if (new_ctx != NO_CONTEXT) { - int octx = sun4c_get_context(); - unsigned long flags; - - flush_user_windows(); - local_irq_save(flags); - sun4c_set_context(new_ctx); - sun4c_flush_page(page); - sun4c_set_context(octx); - local_irq_restore(flags); - } -} - -static void sun4c_flush_page_to_ram(unsigned long page) -{ - unsigned long flags; - - local_irq_save(flags); - sun4c_flush_page(page); - local_irq_restore(flags); -} - -/* Sun4c cache is unified, both instructions and data live there, so - * no need to flush the on-stack instructions for new signal handlers. - */ -static void sun4c_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr) -{ -} - -/* TLB flushing on the sun4c. These routines count on the cache - * flushing code to flush the user register windows so that we need - * not do so when we get here. - */ - -static void sun4c_flush_tlb_all(void) -{ - struct sun4c_mmu_entry *this_entry, *next_entry; - unsigned long flags; - int savectx, ctx; - - local_irq_save(flags); - this_entry = sun4c_kernel_ring.ringhd.next; - savectx = sun4c_get_context(); - flush_user_windows(); - while (sun4c_kernel_ring.num_entries) { - next_entry = this_entry->next; - sun4c_flush_segment(this_entry->vaddr); - for (ctx = 0; ctx < num_contexts; ctx++) { - sun4c_set_context(ctx); - sun4c_put_segmap(this_entry->vaddr, invalid_segment); - } - free_kernel_entry(this_entry, &sun4c_kernel_ring); - this_entry = next_entry; - } - sun4c_set_context(savectx); - local_irq_restore(flags); -} - -static void sun4c_flush_tlb_mm(struct mm_struct *mm) -{ - int new_ctx = mm->context; - - if (new_ctx != NO_CONTEXT) { - struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; - unsigned long flags; - - local_irq_save(flags); - if (head->next != head) { - struct sun4c_mmu_entry *entry = head->next; - int savectx = sun4c_get_context(); - - sun4c_set_context(new_ctx); - sun4c_flush_context(); - do { - struct sun4c_mmu_entry *next = entry->next; - - sun4c_user_unmap(entry); - free_user_entry(new_ctx, entry); - - entry = next; - } while (entry != head); - sun4c_set_context(savectx); - } - local_irq_restore(flags); - } -} - -static void sun4c_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) -{ - struct mm_struct *mm = vma->vm_mm; - int new_ctx = mm->context; - - if (new_ctx != NO_CONTEXT) { - struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; - struct sun4c_mmu_entry *entry; - unsigned long flags; - - local_irq_save(flags); - /* See commentary in sun4c_flush_cache_range(). */ - for (entry = head->next; - (entry != head) && ((entry->vaddr+SUN4C_REAL_PGDIR_SIZE) < start); - entry = entry->next) - ; - - if ((entry != head) && (entry->vaddr < end)) { - int octx = sun4c_get_context(); - - sun4c_set_context(new_ctx); - do { - struct sun4c_mmu_entry *next = entry->next; - - sun4c_flush_segment(entry->vaddr); - sun4c_user_unmap(entry); - free_user_entry(new_ctx, entry); - - entry = next; - } while ((entry != head) && (entry->vaddr < end)); - sun4c_set_context(octx); - } - local_irq_restore(flags); - } -} - -static void sun4c_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) -{ - struct mm_struct *mm = vma->vm_mm; - int new_ctx = mm->context; - - if (new_ctx != NO_CONTEXT) { - int savectx = sun4c_get_context(); - unsigned long flags; - - local_irq_save(flags); - sun4c_set_context(new_ctx); - page &= PAGE_MASK; - sun4c_flush_page(page); - sun4c_put_pte(page, 0); - sun4c_set_context(savectx); - local_irq_restore(flags); - } -} - -static inline void sun4c_mapioaddr(unsigned long physaddr, unsigned long virt_addr) -{ - unsigned long page_entry, pg_iobits; - - pg_iobits = _SUN4C_PAGE_PRESENT | _SUN4C_READABLE | _SUN4C_WRITEABLE | - _SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE; - - page_entry = ((physaddr >> PAGE_SHIFT) & SUN4C_PFN_MASK); - page_entry |= ((pg_iobits | _SUN4C_PAGE_PRIV) & ~(_SUN4C_PAGE_PRESENT)); - sun4c_put_pte(virt_addr, page_entry); -} - -static void sun4c_mapiorange(unsigned int bus, unsigned long xpa, - unsigned long xva, unsigned int len) -{ - while (len != 0) { - len -= PAGE_SIZE; - sun4c_mapioaddr(xpa, xva); - xva += PAGE_SIZE; - xpa += PAGE_SIZE; - } -} - -static void sun4c_unmapiorange(unsigned long virt_addr, unsigned int len) -{ - while (len != 0) { - len -= PAGE_SIZE; - sun4c_put_pte(virt_addr, 0); - virt_addr += PAGE_SIZE; - } -} - -static void sun4c_alloc_context(struct mm_struct *old_mm, struct mm_struct *mm) -{ - struct ctx_list *ctxp; - - ctxp = ctx_free.next; - if (ctxp != &ctx_free) { - remove_from_ctx_list(ctxp); - add_to_used_ctxlist(ctxp); - mm->context = ctxp->ctx_number; - ctxp->ctx_mm = mm; - return; - } - ctxp = ctx_used.next; - if (ctxp->ctx_mm == old_mm) - ctxp = ctxp->next; - remove_from_ctx_list(ctxp); - add_to_used_ctxlist(ctxp); - ctxp->ctx_mm->context = NO_CONTEXT; - ctxp->ctx_mm = mm; - mm->context = ctxp->ctx_number; - sun4c_demap_context(&sun4c_context_ring[ctxp->ctx_number], - ctxp->ctx_number); -} - -/* Switch the current MM context. */ -static void sun4c_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk, int cpu) -{ - struct ctx_list *ctx; - int dirty = 0; - - if (mm->context == NO_CONTEXT) { - dirty = 1; - sun4c_alloc_context(old_mm, mm); - } else { - /* Update the LRU ring of contexts. */ - ctx = ctx_list_pool + mm->context; - remove_from_ctx_list(ctx); - add_to_used_ctxlist(ctx); - } - if (dirty || old_mm != mm) - sun4c_set_context(mm->context); -} - -static void sun4c_destroy_context(struct mm_struct *mm) -{ - struct ctx_list *ctx_old; - - if (mm->context != NO_CONTEXT) { - sun4c_demap_context(&sun4c_context_ring[mm->context], mm->context); - ctx_old = ctx_list_pool + mm->context; - remove_from_ctx_list(ctx_old); - add_to_free_ctxlist(ctx_old); - mm->context = NO_CONTEXT; - } -} - -static void sun4c_mmu_info(struct seq_file *m) -{ - int used_user_entries, i; - - used_user_entries = 0; - for (i = 0; i < num_contexts; i++) - used_user_entries += sun4c_context_ring[i].num_entries; - - seq_printf(m, - "vacsize\t\t: %d bytes\n" - "vachwflush\t: %s\n" - "vaclinesize\t: %d bytes\n" - "mmuctxs\t\t: %d\n" - "mmupsegs\t: %d\n" - "kernelpsegs\t: %d\n" - "kfreepsegs\t: %d\n" - "usedpsegs\t: %d\n" - "ufreepsegs\t: %d\n" - "user_taken\t: %d\n" - "max_taken\t: %d\n", - sun4c_vacinfo.num_bytes, - (sun4c_vacinfo.do_hwflushes ? "yes" : "no"), - sun4c_vacinfo.linesize, - num_contexts, - (invalid_segment + 1), - sun4c_kernel_ring.num_entries, - sun4c_kfree_ring.num_entries, - used_user_entries, - sun4c_ufree_ring.num_entries, - sun4c_user_taken_entries, - max_user_taken_entries); -} - -/* Nothing below here should touch the mmu hardware nor the mmu_entry - * data structures. - */ - -/* First the functions which the mid-level code uses to directly - * manipulate the software page tables. Some defines since we are - * emulating the i386 page directory layout. - */ -#define PGD_PRESENT 0x001 -#define PGD_RW 0x002 -#define PGD_USER 0x004 -#define PGD_ACCESSED 0x020 -#define PGD_DIRTY 0x040 -#define PGD_TABLE (PGD_PRESENT | PGD_RW | PGD_USER | PGD_ACCESSED | PGD_DIRTY) - -static void sun4c_set_pte(pte_t *ptep, pte_t pte) -{ - *ptep = pte; -} - -static void sun4c_pgd_set(pgd_t * pgdp, pmd_t * pmdp) -{ -} - -static void sun4c_pmd_set(pmd_t * pmdp, pte_t * ptep) -{ - pmdp->pmdv[0] = PGD_TABLE | (unsigned long) ptep; -} - -static void sun4c_pmd_populate(pmd_t * pmdp, struct page * ptep) -{ - if (page_address(ptep) == NULL) BUG(); /* No highmem on sun4c */ - pmdp->pmdv[0] = PGD_TABLE | (unsigned long) page_address(ptep); -} - -static int sun4c_pte_present(pte_t pte) -{ - return ((pte_val(pte) & (_SUN4C_PAGE_PRESENT | _SUN4C_PAGE_PRIV)) != 0); -} -static void sun4c_pte_clear(pte_t *ptep) { *ptep = __pte(0); } - -static int sun4c_pmd_bad(pmd_t pmd) -{ - return (((pmd_val(pmd) & ~PAGE_MASK) != PGD_TABLE) || - (!virt_addr_valid(pmd_val(pmd)))); -} - -static int sun4c_pmd_present(pmd_t pmd) -{ - return ((pmd_val(pmd) & PGD_PRESENT) != 0); -} - -#if 0 /* if PMD takes one word */ -static void sun4c_pmd_clear(pmd_t *pmdp) { *pmdp = __pmd(0); } -#else /* if pmd_t is a longish aggregate */ -static void sun4c_pmd_clear(pmd_t *pmdp) { - memset((void *)pmdp, 0, sizeof(pmd_t)); -} -#endif - -static int sun4c_pgd_none(pgd_t pgd) { return 0; } -static int sun4c_pgd_bad(pgd_t pgd) { return 0; } -static int sun4c_pgd_present(pgd_t pgd) { return 1; } -static void sun4c_pgd_clear(pgd_t * pgdp) { } - -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ -static pte_t sun4c_pte_mkwrite(pte_t pte) -{ - pte = __pte(pte_val(pte) | _SUN4C_PAGE_WRITE); - if (pte_val(pte) & _SUN4C_PAGE_MODIFIED) - pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_WRITE); - return pte; -} - -static pte_t sun4c_pte_mkdirty(pte_t pte) -{ - pte = __pte(pte_val(pte) | _SUN4C_PAGE_MODIFIED); - if (pte_val(pte) & _SUN4C_PAGE_WRITE) - pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_WRITE); - return pte; -} - -static pte_t sun4c_pte_mkyoung(pte_t pte) -{ - pte = __pte(pte_val(pte) | _SUN4C_PAGE_ACCESSED); - if (pte_val(pte) & _SUN4C_PAGE_READ) - pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_READ); - return pte; -} - -/* - * Conversion functions: convert a page and protection to a page entry, - * and a page entry and page directory to the page they refer to. - */ -static pte_t sun4c_mk_pte(struct page *page, pgprot_t pgprot) -{ - return __pte(page_to_pfn(page) | pgprot_val(pgprot)); -} - -static pte_t sun4c_mk_pte_phys(unsigned long phys_page, pgprot_t pgprot) -{ - return __pte((phys_page >> PAGE_SHIFT) | pgprot_val(pgprot)); -} - -static pte_t sun4c_mk_pte_io(unsigned long page, pgprot_t pgprot, int space) -{ - return __pte(((page - PAGE_OFFSET) >> PAGE_SHIFT) | pgprot_val(pgprot)); -} - -static unsigned long sun4c_pte_pfn(pte_t pte) -{ - return pte_val(pte) & SUN4C_PFN_MASK; -} - -static pte_t sun4c_pgoff_to_pte(unsigned long pgoff) -{ - return __pte(pgoff | _SUN4C_PAGE_FILE); -} - -static unsigned long sun4c_pte_to_pgoff(pte_t pte) -{ - return pte_val(pte) & ((1UL << PTE_FILE_MAX_BITS) - 1); -} - - -static inline unsigned long sun4c_pmd_page_v(pmd_t pmd) -{ - return (pmd_val(pmd) & PAGE_MASK); -} - -static struct page *sun4c_pmd_page(pmd_t pmd) -{ - return virt_to_page(sun4c_pmd_page_v(pmd)); -} - -static unsigned long sun4c_pgd_page(pgd_t pgd) { return 0; } - -/* to find an entry in a page-table-directory */ -static inline pgd_t *sun4c_pgd_offset(struct mm_struct * mm, unsigned long address) -{ - return mm->pgd + (address >> SUN4C_PGDIR_SHIFT); -} - -/* Find an entry in the second-level page table.. */ -static pmd_t *sun4c_pmd_offset(pgd_t * dir, unsigned long address) -{ - return (pmd_t *) dir; -} - -/* Find an entry in the third-level page table.. */ -pte_t *sun4c_pte_offset_kernel(pmd_t * dir, unsigned long address) -{ - return (pte_t *) sun4c_pmd_page_v(*dir) + - ((address >> PAGE_SHIFT) & (SUN4C_PTRS_PER_PTE - 1)); -} - -static unsigned long sun4c_swp_type(swp_entry_t entry) -{ - return (entry.val & SUN4C_SWP_TYPE_MASK); -} - -static unsigned long sun4c_swp_offset(swp_entry_t entry) -{ - return (entry.val >> SUN4C_SWP_OFF_SHIFT) & SUN4C_SWP_OFF_MASK; -} - -static swp_entry_t sun4c_swp_entry(unsigned long type, unsigned long offset) -{ - return (swp_entry_t) { - (offset & SUN4C_SWP_OFF_MASK) << SUN4C_SWP_OFF_SHIFT - | (type & SUN4C_SWP_TYPE_MASK) }; -} - -static void sun4c_free_pte_slow(pte_t *pte) -{ - free_page((unsigned long)pte); -} - -static void sun4c_free_pgd_slow(pgd_t *pgd) -{ - free_page((unsigned long)pgd); -} - -static pgd_t *sun4c_get_pgd_fast(void) -{ - unsigned long *ret; - - if ((ret = pgd_quicklist) != NULL) { - pgd_quicklist = (unsigned long *)(*ret); - ret[0] = ret[1]; - pgtable_cache_size--; - } else { - pgd_t *init; - - ret = (unsigned long *)__get_free_page(GFP_KERNEL); - memset (ret, 0, (KERNBASE / SUN4C_PGDIR_SIZE) * sizeof(pgd_t)); - init = sun4c_pgd_offset(&init_mm, 0); - memcpy (((pgd_t *)ret) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD, - (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); - } - return (pgd_t *)ret; -} - -static void sun4c_free_pgd_fast(pgd_t *pgd) -{ - *(unsigned long *)pgd = (unsigned long) pgd_quicklist; - pgd_quicklist = (unsigned long *) pgd; - pgtable_cache_size++; -} - - -static inline pte_t * -sun4c_pte_alloc_one_fast(struct mm_struct *mm, unsigned long address) -{ - unsigned long *ret; - - if ((ret = (unsigned long *)pte_quicklist) != NULL) { - pte_quicklist = (unsigned long *)(*ret); - ret[0] = ret[1]; - pgtable_cache_size--; - } - return (pte_t *)ret; -} - -static pte_t *sun4c_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) -{ - pte_t *pte; - - if ((pte = sun4c_pte_alloc_one_fast(mm, address)) != NULL) - return pte; - - pte = (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); - return pte; -} - -static pgtable_t sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address) -{ - pte_t *pte; - struct page *page; - - pte = sun4c_pte_alloc_one_kernel(mm, address); - if (pte == NULL) - return NULL; - page = virt_to_page(pte); - pgtable_page_ctor(page); - return page; -} - -static inline void sun4c_free_pte_fast(pte_t *pte) -{ - *(unsigned long *)pte = (unsigned long) pte_quicklist; - pte_quicklist = (unsigned long *) pte; - pgtable_cache_size++; -} - -static void sun4c_pte_free(pgtable_t pte) -{ - pgtable_page_dtor(pte); - sun4c_free_pte_fast(page_address(pte)); -} - -/* - * allocating and freeing a pmd is trivial: the 1-entry pmd is - * inside the pgd, so has no extra memory associated with it. - */ -static pmd_t *sun4c_pmd_alloc_one(struct mm_struct *mm, unsigned long address) -{ - BUG(); - return NULL; -} - -static void sun4c_free_pmd_fast(pmd_t * pmd) { } - -static void sun4c_check_pgt_cache(int low, int high) -{ - if (pgtable_cache_size > high) { - do { - if (pgd_quicklist) - sun4c_free_pgd_slow(sun4c_get_pgd_fast()); - if (pte_quicklist) - sun4c_free_pte_slow(sun4c_pte_alloc_one_fast(NULL, 0)); - } while (pgtable_cache_size > low); - } -} - -/* An experiment, turn off by default for now... -DaveM */ -#define SUN4C_PRELOAD_PSEG - -void sun4c_update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) -{ - unsigned long flags; - int pseg; - - if (vma->vm_mm->context == NO_CONTEXT) - return; - - local_irq_save(flags); - address &= PAGE_MASK; - if ((pseg = sun4c_get_segmap(address)) == invalid_segment) { - struct sun4c_mmu_entry *entry = sun4c_user_strategy(); - struct mm_struct *mm = vma->vm_mm; - unsigned long start, end; - - entry->vaddr = start = (address & SUN4C_REAL_PGDIR_MASK); - entry->ctx = mm->context; - add_ring_ordered(sun4c_context_ring + mm->context, entry); - sun4c_put_segmap(entry->vaddr, entry->pseg); - end = start + SUN4C_REAL_PGDIR_SIZE; - while (start < end) { -#ifdef SUN4C_PRELOAD_PSEG - pgd_t *pgdp = sun4c_pgd_offset(mm, start); - pte_t *ptep; - - if (!pgdp) - goto no_mapping; - ptep = sun4c_pte_offset_kernel((pmd_t *) pgdp, start); - if (!ptep || !(pte_val(*ptep) & _SUN4C_PAGE_PRESENT)) - goto no_mapping; - sun4c_put_pte(start, pte_val(*ptep)); - goto next; - - no_mapping: -#endif - sun4c_put_pte(start, 0); -#ifdef SUN4C_PRELOAD_PSEG - next: -#endif - start += PAGE_SIZE; - } -#ifndef SUN4C_PRELOAD_PSEG - sun4c_put_pte(address, pte_val(*ptep)); -#endif - local_irq_restore(flags); - return; - } else { - struct sun4c_mmu_entry *entry = &mmu_entry_pool[pseg]; - - remove_lru(entry); - add_lru(entry); - } - - sun4c_put_pte(address, pte_val(*ptep)); - local_irq_restore(flags); -} - -extern void sparc_context_init(int); -extern unsigned long bootmem_init(unsigned long *pages_avail); -extern unsigned long last_valid_pfn; - -void __init sun4c_paging_init(void) -{ - int i, cnt; - unsigned long kernel_end, vaddr; - extern struct resource sparc_iomap; - unsigned long end_pfn, pages_avail; - - kernel_end = (unsigned long) &_end; - kernel_end = SUN4C_REAL_PGDIR_ALIGN(kernel_end); - - pages_avail = 0; - last_valid_pfn = bootmem_init(&pages_avail); - end_pfn = last_valid_pfn; - - sun4c_probe_mmu(); - invalid_segment = (num_segmaps - 1); - sun4c_init_mmu_entry_pool(); - sun4c_init_rings(); - sun4c_init_map_kernelprom(kernel_end); - sun4c_init_clean_mmu(kernel_end); - sun4c_init_fill_kernel_ring(SUN4C_KERNEL_BUCKETS); - sun4c_init_lock_area(sparc_iomap.start, IOBASE_END); - sun4c_init_lock_area(DVMA_VADDR, DVMA_END); - sun4c_init_lock_areas(); - sun4c_init_fill_user_ring(); - - sun4c_set_context(0); - memset(swapper_pg_dir, 0, PAGE_SIZE); - memset(pg0, 0, PAGE_SIZE); - memset(pg1, 0, PAGE_SIZE); - memset(pg2, 0, PAGE_SIZE); - memset(pg3, 0, PAGE_SIZE); - - /* Save work later. */ - vaddr = VMALLOC_START; - swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg0); - vaddr += SUN4C_PGDIR_SIZE; - swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg1); - vaddr += SUN4C_PGDIR_SIZE; - swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg2); - vaddr += SUN4C_PGDIR_SIZE; - swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg3); - sun4c_init_ss2_cache_bug(); - sparc_context_init(num_contexts); - - { - unsigned long zones_size[MAX_NR_ZONES]; - unsigned long zholes_size[MAX_NR_ZONES]; - unsigned long npages; - int znum; - - for (znum = 0; znum < MAX_NR_ZONES; znum++) - zones_size[znum] = zholes_size[znum] = 0; - - npages = max_low_pfn - pfn_base; - - zones_size[ZONE_DMA] = npages; - zholes_size[ZONE_DMA] = npages - pages_avail; - - npages = highend_pfn - max_low_pfn; - zones_size[ZONE_HIGHMEM] = npages; - zholes_size[ZONE_HIGHMEM] = npages - calc_highpages(); - - free_area_init_node(0, zones_size, pfn_base, zholes_size); - } - - cnt = 0; - for (i = 0; i < num_segmaps; i++) - if (mmu_entry_pool[i].locked) - cnt++; - - max_user_taken_entries = num_segmaps - cnt - 40 - 1; - - printk("SUN4C: %d mmu entries for the kernel\n", cnt); -} - -static pgprot_t sun4c_pgprot_noncached(pgprot_t prot) -{ - prot |= __pgprot(_SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE); - - return prot; -} - -/* Load up routines and constants for sun4c mmu */ -void __init ld_mmu_sun4c(void) -{ - extern void ___xchg32_sun4c(void); - - printk("Loading sun4c MMU routines\n"); - - /* First the constants */ - BTFIXUPSET_SIMM13(pgdir_shift, SUN4C_PGDIR_SHIFT); - BTFIXUPSET_SETHI(pgdir_size, SUN4C_PGDIR_SIZE); - BTFIXUPSET_SETHI(pgdir_mask, SUN4C_PGDIR_MASK); - - BTFIXUPSET_SIMM13(ptrs_per_pmd, SUN4C_PTRS_PER_PMD); - BTFIXUPSET_SIMM13(ptrs_per_pgd, SUN4C_PTRS_PER_PGD); - BTFIXUPSET_SIMM13(user_ptrs_per_pgd, KERNBASE / SUN4C_PGDIR_SIZE); - - BTFIXUPSET_INT(page_none, pgprot_val(SUN4C_PAGE_NONE)); - PAGE_SHARED = pgprot_val(SUN4C_PAGE_SHARED); - BTFIXUPSET_INT(page_copy, pgprot_val(SUN4C_PAGE_COPY)); - BTFIXUPSET_INT(page_readonly, pgprot_val(SUN4C_PAGE_READONLY)); - BTFIXUPSET_INT(page_kernel, pgprot_val(SUN4C_PAGE_KERNEL)); - page_kernel = pgprot_val(SUN4C_PAGE_KERNEL); - - /* Functions */ - BTFIXUPSET_CALL(pgprot_noncached, sun4c_pgprot_noncached, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4c, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(do_check_pgt_cache, sun4c_check_pgt_cache, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(flush_cache_all, sun4c_flush_cache_all, BTFIXUPCALL_NORM); - - if (sun4c_vacinfo.do_hwflushes) { - BTFIXUPSET_CALL(sun4c_flush_page, sun4c_flush_page_hw, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(sun4c_flush_segment, sun4c_flush_segment_hw, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(sun4c_flush_context, sun4c_flush_context_hw, BTFIXUPCALL_NORM); - } else { - BTFIXUPSET_CALL(sun4c_flush_page, sun4c_flush_page_sw, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(sun4c_flush_segment, sun4c_flush_segment_sw, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(sun4c_flush_context, sun4c_flush_context_sw, BTFIXUPCALL_NORM); - } - - BTFIXUPSET_CALL(flush_tlb_mm, sun4c_flush_tlb_mm, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(flush_cache_mm, sun4c_flush_cache_mm, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(destroy_context, sun4c_destroy_context, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(switch_mm, sun4c_switch_mm, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(flush_cache_page, sun4c_flush_cache_page, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(flush_tlb_page, sun4c_flush_tlb_page, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(flush_tlb_range, sun4c_flush_tlb_range, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(flush_cache_range, sun4c_flush_cache_range, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(__flush_page_to_ram, sun4c_flush_page_to_ram, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(flush_tlb_all, sun4c_flush_tlb_all, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(flush_sig_insns, sun4c_flush_sig_insns, BTFIXUPCALL_NOP); - - BTFIXUPSET_CALL(set_pte, sun4c_set_pte, BTFIXUPCALL_STO1O0); - - BTFIXUPSET_CALL(pte_pfn, sun4c_pte_pfn, BTFIXUPCALL_NORM); -#if 0 /* PAGE_SHIFT <= 12 */ /* Eek. Investigate. XXX */ - BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_ANDNINT(PAGE_SIZE - 1)); -#else - BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_NORM); -#endif - BTFIXUPSET_CALL(pmd_set, sun4c_pmd_set, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pmd_populate, sun4c_pmd_populate, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(pte_present, sun4c_pte_present, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_clear, sun4c_pte_clear, BTFIXUPCALL_STG0O0); - - BTFIXUPSET_CALL(pmd_bad, sun4c_pmd_bad, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pmd_present, sun4c_pmd_present, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pmd_clear, sun4c_pmd_clear, BTFIXUPCALL_STG0O0); - - BTFIXUPSET_CALL(pgd_none, sun4c_pgd_none, BTFIXUPCALL_RETINT(0)); - BTFIXUPSET_CALL(pgd_bad, sun4c_pgd_bad, BTFIXUPCALL_RETINT(0)); - BTFIXUPSET_CALL(pgd_present, sun4c_pgd_present, BTFIXUPCALL_RETINT(1)); - BTFIXUPSET_CALL(pgd_clear, sun4c_pgd_clear, BTFIXUPCALL_NOP); - - BTFIXUPSET_CALL(mk_pte, sun4c_mk_pte, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mk_pte_phys, sun4c_mk_pte_phys, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mk_pte_io, sun4c_mk_pte_io, BTFIXUPCALL_NORM); - - BTFIXUPSET_INT(pte_modify_mask, _SUN4C_PAGE_CHG_MASK); - BTFIXUPSET_CALL(pmd_offset, sun4c_pmd_offset, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_offset_kernel, sun4c_pte_offset_kernel, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(free_pte_fast, sun4c_free_pte_fast, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_free, sun4c_pte_free, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_alloc_one_kernel, sun4c_pte_alloc_one_kernel, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_alloc_one, sun4c_pte_alloc_one, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(free_pmd_fast, sun4c_free_pmd_fast, BTFIXUPCALL_NOP); - BTFIXUPSET_CALL(pmd_alloc_one, sun4c_pmd_alloc_one, BTFIXUPCALL_RETO0); - BTFIXUPSET_CALL(free_pgd_fast, sun4c_free_pgd_fast, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(get_pgd_fast, sun4c_get_pgd_fast, BTFIXUPCALL_NORM); - - BTFIXUPSET_HALF(pte_writei, _SUN4C_PAGE_WRITE); - BTFIXUPSET_HALF(pte_dirtyi, _SUN4C_PAGE_MODIFIED); - BTFIXUPSET_HALF(pte_youngi, _SUN4C_PAGE_ACCESSED); - BTFIXUPSET_HALF(pte_filei, _SUN4C_PAGE_FILE); - BTFIXUPSET_HALF(pte_wrprotecti, _SUN4C_PAGE_WRITE|_SUN4C_PAGE_SILENT_WRITE); - BTFIXUPSET_HALF(pte_mkcleani, _SUN4C_PAGE_MODIFIED|_SUN4C_PAGE_SILENT_WRITE); - BTFIXUPSET_HALF(pte_mkoldi, _SUN4C_PAGE_ACCESSED|_SUN4C_PAGE_SILENT_READ); - BTFIXUPSET_CALL(pte_mkwrite, sun4c_pte_mkwrite, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_mkdirty, sun4c_pte_mkdirty, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pte_mkyoung, sun4c_pte_mkyoung, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(update_mmu_cache, sun4c_update_mmu_cache, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(pte_to_pgoff, sun4c_pte_to_pgoff, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(pgoff_to_pte, sun4c_pgoff_to_pte, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(mmu_lockarea, sun4c_lockarea, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mmu_unlockarea, sun4c_unlockarea, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(mmu_get_scsi_one, sun4c_get_scsi_one, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mmu_get_scsi_sgl, sun4c_get_scsi_sgl, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mmu_release_scsi_one, sun4c_release_scsi_one, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mmu_release_scsi_sgl, sun4c_release_scsi_sgl, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(mmu_map_dma_area, sun4c_map_dma_area, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(mmu_unmap_dma_area, sun4c_unmap_dma_area, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(sparc_mapiorange, sun4c_mapiorange, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(sparc_unmapiorange, sun4c_unmapiorange, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(__swp_type, sun4c_swp_type, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(__swp_offset, sun4c_swp_offset, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(__swp_entry, sun4c_swp_entry, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(alloc_thread_info_node, sun4c_alloc_thread_info_node, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(free_thread_info, sun4c_free_thread_info, BTFIXUPCALL_NORM); - - BTFIXUPSET_CALL(mmu_info, sun4c_mmu_info, BTFIXUPCALL_NORM); - - /* These should _never_ get called with two level tables. */ - BTFIXUPSET_CALL(pgd_set, sun4c_pgd_set, BTFIXUPCALL_NOP); - BTFIXUPSET_CALL(pgd_page_vaddr, sun4c_pgd_page, BTFIXUPCALL_RETO0); -} |