diff options
Diffstat (limited to 'arch/blackfin/kernel/cplb-nompu')
| -rw-r--r-- | arch/blackfin/kernel/cplb-nompu/Makefile | 11 | ||||
| -rw-r--r-- | arch/blackfin/kernel/cplb-nompu/cplbinit.c | 212 | ||||
| -rw-r--r-- | arch/blackfin/kernel/cplb-nompu/cplbmgr.c | 227 |
3 files changed, 0 insertions, 450 deletions
diff --git a/arch/blackfin/kernel/cplb-nompu/Makefile b/arch/blackfin/kernel/cplb-nompu/Makefile deleted file mode 100644 index 81baa27bc389..000000000000 --- a/arch/blackfin/kernel/cplb-nompu/Makefile +++ /dev/null @@ -1,11 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# arch/blackfin/kernel/cplb-nompu/Makefile -# - -obj-y := cplbinit.o cplbmgr.o - -CFLAGS_cplbmgr.o := -ffixed-I0 -ffixed-I1 -ffixed-I2 -ffixed-I3 \ - -ffixed-L0 -ffixed-L1 -ffixed-L2 -ffixed-L3 \ - -ffixed-M0 -ffixed-M1 -ffixed-M2 -ffixed-M3 \ - -ffixed-B0 -ffixed-B1 -ffixed-B2 -ffixed-B3 diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c deleted file mode 100644 index b49a53b583d5..000000000000 --- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * Blackfin CPLB initialization - * - * Copyright 2007-2009 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/module.h> - -#include <asm/blackfin.h> -#include <asm/cacheflush.h> -#include <asm/cplb.h> -#include <asm/cplbinit.h> -#include <asm/mem_map.h> - -struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR; -struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR; - -int first_switched_icplb PDT_ATTR; -int first_switched_dcplb PDT_ATTR; - -struct cplb_boundary dcplb_bounds[9] PDT_ATTR; -struct cplb_boundary icplb_bounds[9] PDT_ATTR; - -int icplb_nr_bounds PDT_ATTR; -int dcplb_nr_bounds PDT_ATTR; - -void __init generate_cplb_tables_cpu(unsigned int cpu) -{ - int i_d, i_i; - unsigned long addr; - unsigned long cplb_pageflags, cplb_pagesize; - - struct cplb_entry *d_tbl = dcplb_tbl[cpu]; - struct cplb_entry *i_tbl = icplb_tbl[cpu]; - - printk(KERN_INFO "NOMPU: setting up cplb tables\n"); - - i_d = i_i = 0; - -#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO - /* Set up the zero page. */ - d_tbl[i_d].addr = 0; - d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB; - i_tbl[i_i].addr = 0; - i_tbl[i_i++].data = SDRAM_OOPS | PAGE_SIZE_1KB; -#endif - - /* Cover kernel memory with 4M pages. */ - addr = 0; - -#ifdef PAGE_SIZE_16MB - cplb_pageflags = PAGE_SIZE_16MB; - cplb_pagesize = SIZE_16M; -#else - cplb_pageflags = PAGE_SIZE_4MB; - cplb_pagesize = SIZE_4M; -#endif - - - for (; addr < memory_start; addr += cplb_pagesize) { - d_tbl[i_d].addr = addr; - d_tbl[i_d++].data = SDRAM_DGENERIC | cplb_pageflags; - i_tbl[i_i].addr = addr; - i_tbl[i_i++].data = SDRAM_IGENERIC | cplb_pageflags; - } - -#ifdef CONFIG_ROMKERNEL - /* Cover kernel XIP flash area */ -#ifdef CONFIG_BF60x - addr = CONFIG_ROM_BASE & ~(16 * 1024 * 1024 - 1); - d_tbl[i_d].addr = addr; - d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_16MB; - i_tbl[i_i].addr = addr; - i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_16MB; -#else - addr = CONFIG_ROM_BASE & ~(4 * 1024 * 1024 - 1); - d_tbl[i_d].addr = addr; - d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB; - i_tbl[i_i].addr = addr; - i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB; -#endif -#endif - - /* Cover L1 memory. One 4M area for code and data each is enough. */ - if (cpu == 0) { - if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) { - d_tbl[i_d].addr = L1_DATA_A_START; - d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB; - } - i_tbl[i_i].addr = L1_CODE_START; - i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB; - } -#ifdef CONFIG_SMP - else { - if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) { - d_tbl[i_d].addr = COREB_L1_DATA_A_START; - d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB; - } - i_tbl[i_i].addr = COREB_L1_CODE_START; - i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB; - } -#endif - first_switched_dcplb = i_d; - first_switched_icplb = i_i; - - BUG_ON(first_switched_dcplb > MAX_CPLBS); - BUG_ON(first_switched_icplb > MAX_CPLBS); - - while (i_d < MAX_CPLBS) - d_tbl[i_d++].data = 0; - while (i_i < MAX_CPLBS) - i_tbl[i_i++].data = 0; -} - -void __init generate_cplb_tables_all(void) -{ - unsigned long uncached_end; - int i_d, i_i; - - i_d = 0; - /* Normal RAM, including MTD FS. */ -#ifdef CONFIG_MTD_UCLINUX - uncached_end = memory_mtd_start + mtd_size; -#else - uncached_end = memory_end; -#endif - /* - * if DMA uncached is less than 1MB, mark the 1MB chunk as uncached - * so that we don't have to use 4kB pages and cause CPLB thrashing - */ - if ((DMA_UNCACHED_REGION >= 1 * 1024 * 1024) || !DMA_UNCACHED_REGION || - ((_ramend - uncached_end) >= 1 * 1024 * 1024)) - dcplb_bounds[i_d].eaddr = uncached_end; - else - dcplb_bounds[i_d].eaddr = uncached_end & ~(1 * 1024 * 1024 - 1); - dcplb_bounds[i_d++].data = SDRAM_DGENERIC; - /* DMA uncached region. */ - if (DMA_UNCACHED_REGION) { - dcplb_bounds[i_d].eaddr = _ramend; - dcplb_bounds[i_d++].data = SDRAM_DNON_CHBL; - } - if (_ramend != physical_mem_end) { - /* Reserved memory. */ - dcplb_bounds[i_d].eaddr = physical_mem_end; - dcplb_bounds[i_d++].data = (reserved_mem_dcache_on ? - SDRAM_DGENERIC : SDRAM_DNON_CHBL); - } - /* Addressing hole up to the async bank. */ - dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE; - dcplb_bounds[i_d++].data = 0; - /* ASYNC banks. */ - dcplb_bounds[i_d].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE; - dcplb_bounds[i_d++].data = SDRAM_EBIU; - /* Addressing hole up to BootROM. */ - dcplb_bounds[i_d].eaddr = BOOT_ROM_START; - dcplb_bounds[i_d++].data = 0; - /* BootROM -- largest one should be less than 1 meg. */ - dcplb_bounds[i_d].eaddr = BOOT_ROM_START + BOOT_ROM_LENGTH; - dcplb_bounds[i_d++].data = SDRAM_DGENERIC; - if (L2_LENGTH) { - /* Addressing hole up to L2 SRAM. */ - dcplb_bounds[i_d].eaddr = L2_START; - dcplb_bounds[i_d++].data = 0; - /* L2 SRAM. */ - dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH; - dcplb_bounds[i_d++].data = L2_DMEMORY; - } - dcplb_nr_bounds = i_d; - BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds)); - - i_i = 0; - /* Normal RAM, including MTD FS. */ - icplb_bounds[i_i].eaddr = uncached_end; - icplb_bounds[i_i++].data = SDRAM_IGENERIC; - if (_ramend != physical_mem_end) { - /* DMA uncached region. */ - if (DMA_UNCACHED_REGION) { - /* Normally this hole is caught by the async below. */ - icplb_bounds[i_i].eaddr = _ramend; - icplb_bounds[i_i++].data = 0; - } - /* Reserved memory. */ - icplb_bounds[i_i].eaddr = physical_mem_end; - icplb_bounds[i_i++].data = (reserved_mem_icache_on ? - SDRAM_IGENERIC : SDRAM_INON_CHBL); - } - /* Addressing hole up to the async bank. */ - icplb_bounds[i_i].eaddr = ASYNC_BANK0_BASE; - icplb_bounds[i_i++].data = 0; - /* ASYNC banks. */ - icplb_bounds[i_i].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE; - icplb_bounds[i_i++].data = SDRAM_EBIU; - /* Addressing hole up to BootROM. */ - icplb_bounds[i_i].eaddr = BOOT_ROM_START; - icplb_bounds[i_i++].data = 0; - /* BootROM -- largest one should be less than 1 meg. */ - icplb_bounds[i_i].eaddr = BOOT_ROM_START + BOOT_ROM_LENGTH; - icplb_bounds[i_i++].data = SDRAM_IGENERIC; - - if (L2_LENGTH) { - /* Addressing hole up to L2 SRAM. */ - icplb_bounds[i_i].eaddr = L2_START; - icplb_bounds[i_i++].data = 0; - /* L2 SRAM. */ - icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH; - icplb_bounds[i_i++].data = L2_IMEMORY; - } - icplb_nr_bounds = i_i; - BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds)); -} diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c deleted file mode 100644 index 79cc0f6dcdd5..000000000000 --- a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * Based on: arch/blackfin/kernel/cplb-mpu/cplbmgr.c - * Author: Michael McTernan <mmcternan@airvana.com> - * - * Description: CPLB miss handler. - * - * Modified: - * Copyright 2008 Airvana Inc. - * Copyright 2008-2009 Analog Devices Inc. - * - * Licensed under the GPL-2 or later - */ - -#include <linux/kernel.h> -#include <asm/blackfin.h> -#include <asm/cplbinit.h> -#include <asm/cplb.h> -#include <asm/mmu_context.h> -#include <asm/traps.h> - -/* - * WARNING - * - * This file is compiled with certain -ffixed-reg options. We have to - * make sure not to call any functions here that could clobber these - * registers. - */ - -int nr_dcplb_miss[NR_CPUS], nr_icplb_miss[NR_CPUS]; -int nr_dcplb_supv_miss[NR_CPUS], nr_icplb_supv_miss[NR_CPUS]; -int nr_cplb_flush[NR_CPUS], nr_dcplb_prot[NR_CPUS]; - -#ifdef CONFIG_EXCPT_IRQ_SYSC_L1 -#define MGR_ATTR __attribute__((l1_text)) -#else -#define MGR_ATTR -#endif - -static inline void write_dcplb_data(int cpu, int idx, unsigned long data, - unsigned long addr) -{ - _disable_dcplb(); - bfin_write32(DCPLB_DATA0 + idx * 4, data); - bfin_write32(DCPLB_ADDR0 + idx * 4, addr); - _enable_dcplb(); - -#ifdef CONFIG_CPLB_INFO - dcplb_tbl[cpu][idx].addr = addr; - dcplb_tbl[cpu][idx].data = data; -#endif -} - -static inline void write_icplb_data(int cpu, int idx, unsigned long data, - unsigned long addr) -{ - _disable_icplb(); - bfin_write32(ICPLB_DATA0 + idx * 4, data); - bfin_write32(ICPLB_ADDR0 + idx * 4, addr); - _enable_icplb(); - -#ifdef CONFIG_CPLB_INFO - icplb_tbl[cpu][idx].addr = addr; - icplb_tbl[cpu][idx].data = data; -#endif -} - -/* Counters to implement round-robin replacement. */ -static int icplb_rr_index[NR_CPUS] PDT_ATTR; -static int dcplb_rr_index[NR_CPUS] PDT_ATTR; - -/* - * Find an ICPLB entry to be evicted and return its index. - */ -static int evict_one_icplb(int cpu) -{ - int i = first_switched_icplb + icplb_rr_index[cpu]; - if (i >= MAX_CPLBS) { - i -= MAX_CPLBS - first_switched_icplb; - icplb_rr_index[cpu] -= MAX_CPLBS - first_switched_icplb; - } - icplb_rr_index[cpu]++; - return i; -} - -static int evict_one_dcplb(int cpu) -{ - int i = first_switched_dcplb + dcplb_rr_index[cpu]; - if (i >= MAX_CPLBS) { - i -= MAX_CPLBS - first_switched_dcplb; - dcplb_rr_index[cpu] -= MAX_CPLBS - first_switched_dcplb; - } - dcplb_rr_index[cpu]++; - return i; -} - -MGR_ATTR static int icplb_miss(int cpu) -{ - unsigned long addr = bfin_read_ICPLB_FAULT_ADDR(); - int status = bfin_read_ICPLB_STATUS(); - int idx; - unsigned long i_data, base, addr1, eaddr; - - nr_icplb_miss[cpu]++; - if (unlikely(status & FAULT_USERSUPV)) - nr_icplb_supv_miss[cpu]++; - - base = 0; - idx = 0; - do { - eaddr = icplb_bounds[idx].eaddr; - if (addr < eaddr) - break; - base = eaddr; - } while (++idx < icplb_nr_bounds); - - if (unlikely(idx == icplb_nr_bounds)) - return CPLB_NO_ADDR_MATCH; - - i_data = icplb_bounds[idx].data; - if (unlikely(i_data == 0)) - return CPLB_NO_ADDR_MATCH; - - addr1 = addr & ~(SIZE_4M - 1); - addr &= ~(SIZE_1M - 1); - i_data |= PAGE_SIZE_1MB; - if (addr1 >= base && (addr1 + SIZE_4M) <= eaddr) { - /* - * This works because - * (PAGE_SIZE_4MB & PAGE_SIZE_1MB) == PAGE_SIZE_1MB. - */ - i_data |= PAGE_SIZE_4MB; - addr = addr1; - } - - /* Pick entry to evict */ - idx = evict_one_icplb(cpu); - - write_icplb_data(cpu, idx, i_data, addr); - - return CPLB_RELOADED; -} - -MGR_ATTR static int dcplb_miss(int cpu) -{ - unsigned long addr = bfin_read_DCPLB_FAULT_ADDR(); - int status = bfin_read_DCPLB_STATUS(); - int idx; - unsigned long d_data, base, addr1, eaddr, cplb_pagesize, cplb_pageflags; - - nr_dcplb_miss[cpu]++; - if (unlikely(status & FAULT_USERSUPV)) - nr_dcplb_supv_miss[cpu]++; - - base = 0; - idx = 0; - do { - eaddr = dcplb_bounds[idx].eaddr; - if (addr < eaddr) - break; - base = eaddr; - } while (++idx < dcplb_nr_bounds); - - if (unlikely(idx == dcplb_nr_bounds)) - return CPLB_NO_ADDR_MATCH; - - d_data = dcplb_bounds[idx].data; - if (unlikely(d_data == 0)) - return CPLB_NO_ADDR_MATCH; - - addr &= ~(SIZE_1M - 1); - d_data |= PAGE_SIZE_1MB; - - /* BF60x support large than 4M CPLB page size */ -#ifdef PAGE_SIZE_16MB - cplb_pageflags = PAGE_SIZE_16MB; - cplb_pagesize = SIZE_16M; -#else - cplb_pageflags = PAGE_SIZE_4MB; - cplb_pagesize = SIZE_4M; -#endif - -find_pagesize: - addr1 = addr & ~(cplb_pagesize - 1); - if (addr1 >= base && (addr1 + cplb_pagesize) <= eaddr) { - /* - * This works because - * (PAGE_SIZE_4MB & PAGE_SIZE_1MB) == PAGE_SIZE_1MB. - */ - d_data |= cplb_pageflags; - addr = addr1; - goto found_pagesize; - } else { - if (cplb_pagesize > SIZE_4M) { - cplb_pageflags = PAGE_SIZE_4MB; - cplb_pagesize = SIZE_4M; - goto find_pagesize; - } - } - -found_pagesize: -#ifdef CONFIG_BF60x - if ((addr >= ASYNC_BANK0_BASE) - && (addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE)) - d_data |= PAGE_SIZE_64MB; -#endif - - /* Pick entry to evict */ - idx = evict_one_dcplb(cpu); - - write_dcplb_data(cpu, idx, d_data, addr); - - return CPLB_RELOADED; -} - -MGR_ATTR int cplb_hdr(int seqstat, struct pt_regs *regs) -{ - int cause = seqstat & 0x3f; - unsigned int cpu = raw_smp_processor_id(); - switch (cause) { - case VEC_CPLB_I_M: - return icplb_miss(cpu); - case VEC_CPLB_M: - return dcplb_miss(cpu); - default: - return CPLB_UNKNOWN_ERR; - } -} |