diff options
Diffstat (limited to 'arch/microblaze/include')
| -rw-r--r-- | arch/microblaze/include/asm/fixmap.h | 109 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/highmem.h | 96 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/mmu.h | 12 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/page.h | 4 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pci-bridge.h | 1 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pci.h | 8 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/pgtable.h | 5 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/setup.h | 3 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/uaccess.h | 2 |
9 files changed, 224 insertions, 16 deletions
diff --git a/arch/microblaze/include/asm/fixmap.h b/arch/microblaze/include/asm/fixmap.h new file mode 100644 index 000000000000..f2b312e10b10 --- /dev/null +++ b/arch/microblaze/include/asm/fixmap.h @@ -0,0 +1,109 @@ +/* + * fixmap.h: compile-time virtual memory allocation + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1998 Ingo Molnar + * + * Copyright 2008 Freescale Semiconductor Inc. + * Port to powerpc added by Kumar Gala + * + * Copyright 2011 Michal Simek <monstr@monstr.eu> + * Copyright 2011 PetaLogix Qld Pty Ltd + * Port to Microblaze + */ + +#ifndef _ASM_FIXMAP_H +#define _ASM_FIXMAP_H + +#ifndef __ASSEMBLY__ +#include <linux/kernel.h> +#include <asm/page.h> +#ifdef CONFIG_HIGHMEM +#include <linux/threads.h> +#include <asm/kmap_types.h> +#endif + +#define FIXADDR_TOP ((unsigned long)(-PAGE_SIZE)) + +/* + * Here we define all the compile-time 'special' virtual + * addresses. The point is to have a constant address at + * compile time, but to set the physical address only + * in the boot process. We allocate these special addresses + * from the end of virtual memory (0xfffff000) backwards. + * Also this lets us do fail-safe vmalloc(), we + * can guarantee that these special addresses and + * vmalloc()-ed addresses never overlap. + * + * these 'compile-time allocated' memory buffers are + * fixed-size 4k pages. (or larger if used with an increment + * highger than 1) use fixmap_set(idx,phys) to associate + * physical memory with fixmap indices. + * + * TLB entries of such buffers will not be flushed across + * task switches. + */ +enum fixed_addresses { + FIX_HOLE, +#ifdef CONFIG_HIGHMEM + FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */ + FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * num_possible_cpus()) - 1, +#endif + __end_of_fixed_addresses +}; + +extern void __set_fixmap(enum fixed_addresses idx, + phys_addr_t phys, pgprot_t flags); + +#define set_fixmap(idx, phys) \ + __set_fixmap(idx, phys, PAGE_KERNEL) +/* + * Some hardware wants to get fixmapped without caching. + */ +#define set_fixmap_nocache(idx, phys) \ + __set_fixmap(idx, phys, PAGE_KERNEL_CI) + +#define clear_fixmap(idx) \ + __set_fixmap(idx, 0, __pgprot(0)) + +#define __FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) +#define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE) + +#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) +#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) + +extern void __this_fixmap_does_not_exist(void); + +/* + * 'index to address' translation. If anyone tries to use the idx + * directly without tranlation, we catch the bug with a NULL-deference + * kernel oops. Illegal ranges of incoming indices are caught too. + */ +static __always_inline unsigned long fix_to_virt(const unsigned int idx) +{ + /* + * this branch gets completely eliminated after inlining, + * except when someone tries to use fixaddr indices in an + * illegal way. (such as mixing up address types or using + * out-of-range indices). + * + * If it doesn't get removed, the linker will complain + * loudly with a reasonably clear error message.. + */ + if (idx >= __end_of_fixed_addresses) + __this_fixmap_does_not_exist(); + + return __fix_to_virt(idx); +} + +static inline unsigned long virt_to_fix(const unsigned long vaddr) +{ + BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); + return __virt_to_fix(vaddr); +} + +#endif /* !__ASSEMBLY__ */ +#endif diff --git a/arch/microblaze/include/asm/highmem.h b/arch/microblaze/include/asm/highmem.h new file mode 100644 index 000000000000..2446a73140ac --- /dev/null +++ b/arch/microblaze/include/asm/highmem.h @@ -0,0 +1,96 @@ +/* + * highmem.h: virtual kernel memory mappings for high memory + * + * Used in CONFIG_HIGHMEM systems for memory pages which + * are not addressable by direct kernel virtual addresses. + * + * Copyright (C) 1999 Gerhard Wichert, Siemens AG + * Gerhard.Wichert@pdb.siemens.de + * + * + * Redesigned the x86 32-bit VM architecture to deal with + * up to 16 Terabyte physical memory. With current x86 CPUs + * we now support up to 64 Gigabytes physical RAM. + * + * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com> + */ +#ifndef _ASM_HIGHMEM_H +#define _ASM_HIGHMEM_H + +#ifdef __KERNEL__ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/uaccess.h> +#include <asm/fixmap.h> + +extern pte_t *kmap_pte; +extern pgprot_t kmap_prot; +extern pte_t *pkmap_page_table; + +/* + * Right now we initialize only a single pte table. It can be extended + * easily, subsequent pte tables have to be allocated in one physical + * chunk of RAM. + */ +/* + * We use one full pte table with 4K pages. And with 16K/64K/256K pages pte + * table covers enough memory (32MB/512MB/2GB resp.), so that both FIXMAP + * and PKMAP can be placed in a single pte table. We use 512 pages for PKMAP + * in case of 16K/64K/256K page sizes. + */ + +#define PKMAP_ORDER PTE_SHIFT +#define LAST_PKMAP (1 << PKMAP_ORDER) + +#define PKMAP_BASE ((FIXADDR_START - PAGE_SIZE * (LAST_PKMAP + 1)) \ + & PMD_MASK) + +#define LAST_PKMAP_MASK (LAST_PKMAP - 1) +#define PKMAP_NR(virt) ((virt - PKMAP_BASE) >> PAGE_SHIFT) +#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) + +extern void *kmap_high(struct page *page); +extern void kunmap_high(struct page *page); +extern void *kmap_atomic_prot(struct page *page, pgprot_t prot); +extern void __kunmap_atomic(void *kvaddr); + +static inline void *kmap(struct page *page) +{ + might_sleep(); + if (!PageHighMem(page)) + return page_address(page); + return kmap_high(page); +} + +static inline void kunmap(struct page *page) +{ + BUG_ON(in_interrupt()); + if (!PageHighMem(page)) + return; + kunmap_high(page); +} + +static inline void *__kmap_atomic(struct page *page) +{ + return kmap_atomic_prot(page, kmap_prot); +} + +static inline struct page *kmap_atomic_to_page(void *ptr) +{ + unsigned long idx, vaddr = (unsigned long) ptr; + pte_t *pte; + + if (vaddr < FIXADDR_START) + return virt_to_page(ptr); + + idx = virt_to_fix(vaddr); + pte = kmap_pte - (idx - FIX_KMAP_BEGIN); + return pte_page(*pte); +} + +#define flush_cache_kmaps() { flush_icache(); flush_dcache(); } + +#endif /* __KERNEL__ */ + +#endif /* _ASM_HIGHMEM_H */ diff --git a/arch/microblaze/include/asm/mmu.h b/arch/microblaze/include/asm/mmu.h index 8d6a654ceffb..1f9edddf7f4b 100644 --- a/arch/microblaze/include/asm/mmu.h +++ b/arch/microblaze/include/asm/mmu.h @@ -56,6 +56,12 @@ typedef struct _SEGREG { extern void _tlbie(unsigned long va); /* invalidate a TLB entry */ extern void _tlbia(void); /* invalidate all TLB entries */ + +/* + * tlb_skip size stores actual number skipped TLBs from TLB0 - every directy TLB + * mapping has to increase tlb_skip size. + */ +extern u32 tlb_skip; # endif /* __ASSEMBLY__ */ /* @@ -69,6 +75,12 @@ extern void _tlbia(void); /* invalidate all TLB entries */ # define MICROBLAZE_TLB_SIZE 64 +/* For cases when you want to skip some TLB entries */ +# define MICROBLAZE_TLB_SKIP 0 + +/* Use the last TLB for temporary access to LMB */ +# define MICROBLAZE_LMB_TLB_ID 63 + /* * TLB entries are defined by a "high" tag portion and a "low" data * portion. The data portion is 32-bits. diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index a25e6b5e2ad4..287c5485d286 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -135,8 +135,10 @@ extern unsigned long min_low_pfn; extern unsigned long max_pfn; extern unsigned long memory_start; -extern unsigned long memory_end; extern unsigned long memory_size; +extern unsigned long lowmem_size; + +extern unsigned long kernel_tlb; extern int page_is_ram(unsigned long pfn); diff --git a/arch/microblaze/include/asm/pci-bridge.h b/arch/microblaze/include/asm/pci-bridge.h index e9834b2991d0..cb5d39794800 100644 --- a/arch/microblaze/include/asm/pci-bridge.h +++ b/arch/microblaze/include/asm/pci-bridge.h @@ -10,7 +10,6 @@ #include <linux/pci.h> #include <linux/list.h> #include <linux/ioport.h> -#include <asm-generic/pci-bridge.h> struct device_node; diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h index 033137628e8a..a0da88bf70c5 100644 --- a/arch/microblaze/include/asm/pci.h +++ b/arch/microblaze/include/asm/pci.h @@ -94,14 +94,6 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus, */ #define PCI_DMA_BUS_IS_PHYS (1) -extern void pcibios_resource_to_bus(struct pci_dev *dev, - struct pci_bus_region *region, - struct resource *res); - -extern void pcibios_bus_to_resource(struct pci_dev *dev, - struct resource *res, - struct pci_bus_region *region); - static inline struct resource *pcibios_select_root(struct pci_dev *pdev, struct resource *res) { diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h index b2af42311a12..3ef7b9cafeca 100644 --- a/arch/microblaze/include/asm/pgtable.h +++ b/arch/microblaze/include/asm/pgtable.h @@ -94,8 +94,7 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; } /* Start and end of the vmalloc area. */ /* Make sure to map the vmalloc area above the pinned kernel memory area of 32Mb. */ -#define VMALLOC_START (CONFIG_KERNEL_START + \ - max(32 * 1024 * 1024UL, memory_size)) +#define VMALLOC_START (CONFIG_KERNEL_START + CONFIG_LOWMEM_SIZE) #define VMALLOC_END ioremap_bot #endif /* __ASSEMBLY__ */ @@ -543,8 +542,6 @@ extern unsigned long iopa(unsigned long addr); /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ #define kern_addr_valid(addr) (1) -#define io_remap_page_range remap_page_range - /* * No page table caches to initialise */ diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h index aa22511819d8..0061aa13a340 100644 --- a/arch/microblaze/include/asm/setup.h +++ b/arch/microblaze/include/asm/setup.h @@ -41,7 +41,8 @@ extern void of_platform_reset_gpio_probe(void); void time_init(void); void init_IRQ(void); void machine_early_init(const char *cmdline, unsigned int ram, - unsigned int fdt, unsigned int msr); + unsigned int fdt, unsigned int msr, unsigned int tlb0, + unsigned int tlb1); void machine_restart(char *cmd); void machine_shutdown(void); diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h index 072b0077abf9..ef25f7538d4a 100644 --- a/arch/microblaze/include/asm/uaccess.h +++ b/arch/microblaze/include/asm/uaccess.h @@ -80,7 +80,7 @@ extern unsigned long search_exception_table(unsigned long); static inline int ___range_ok(unsigned long addr, unsigned long size) { return ((addr < memory_start) || - ((addr + size) > memory_end)); + ((addr + size - 1) > (memory_start + memory_size - 1))); } #define __range_ok(addr, size) \ |