diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash-4k.h | 13 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash-64k.h | 11 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash.h | 95 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/mmu-hash.h | 31 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/radix.h | 41 |
6 files changed, 119 insertions, 73 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h b/arch/powerpc/include/asm/book3s/64/hash-4k.h index 54fab723a8c7..4c9dfd625461 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-4k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h @@ -13,6 +13,19 @@ */ #define MAX_EA_BITS_PER_CONTEXT 46 +/* + * Our page table limit us to 64TB. Hence for the kernel mapping, + * each MAP area is limited to 16 TB. + * The four map areas are: linear mapping, vmap, IO and vmemmap + */ +#define H_KERN_MAP_SIZE (ASM_CONST(1) << (MAX_EA_BITS_PER_CONTEXT - 2)) + +/* + * Define the address range of the kernel non-linear virtual area + * 16TB + */ +#define H_KERN_VIRT_START ASM_CONST(0xc000100000000000) + #ifndef __ASSEMBLY__ #define H_PTE_TABLE_SIZE (sizeof(pte_t) << H_PTE_INDEX_SIZE) #define H_PMD_TABLE_SIZE (sizeof(pmd_t) << H_PMD_INDEX_SIZE) diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h index 81f4eb6e7da4..0d0191cda050 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-64k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h @@ -15,6 +15,17 @@ #define MAX_EA_BITS_PER_CONTEXT 49 /* + * We use one context for each MAP area. + */ +#define H_KERN_MAP_SIZE (1UL << MAX_EA_BITS_PER_CONTEXT) + +/* + * Define the address range of the kernel non-linear virtual area + * 2PB + */ +#define H_KERN_VIRT_START ASM_CONST(0xc008000000000000) + +/* * 64k aligned address free up few of the lower bits of RPN for us * We steal that here. For more deatils look at pte_pfn/pfn_pte() */ diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h index 8cbc4106d449..76741a221910 100644 --- a/arch/powerpc/include/asm/book3s/64/hash.h +++ b/arch/powerpc/include/asm/book3s/64/hash.h @@ -29,6 +29,10 @@ #define H_PGTABLE_EADDR_SIZE (H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + \ H_PUD_INDEX_SIZE + H_PGD_INDEX_SIZE + PAGE_SHIFT) #define H_PGTABLE_RANGE (ASM_CONST(1) << H_PGTABLE_EADDR_SIZE) +/* + * Top 2 bits are ignored in page table walk. + */ +#define EA_MASK (~(0xcUL << 60)) /* * We store the slot details in the second half of page table. @@ -42,53 +46,56 @@ #endif /* - * Define the address range of the kernel non-linear virtual area. In contrast - * to the linear mapping, this is managed using the kernel page tables and then - * inserted into the hash page table to actually take effect, similarly to user - * mappings. + * +------------------------------+ + * | | + * | | + * | | + * +------------------------------+ Kernel virtual map end (0xc00e000000000000) + * | | + * | | + * | 512TB/16TB of vmemmap | + * | | + * | | + * +------------------------------+ Kernel vmemmap start + * | | + * | 512TB/16TB of IO map | + * | | + * +------------------------------+ Kernel IO map start + * | | + * | 512TB/16TB of vmap | + * | | + * +------------------------------+ Kernel virt start (0xc008000000000000) + * | | + * | | + * | | + * +------------------------------+ Kernel linear (0xc.....) */ -#define H_KERN_VIRT_START ASM_CONST(0xD000000000000000) -/* - * Allow virtual mapping of one context size. - * 512TB for 64K page size - * 64TB for 4K page size - */ -#define H_KERN_VIRT_SIZE (1UL << MAX_EA_BITS_PER_CONTEXT) +#define H_VMALLOC_START H_KERN_VIRT_START +#define H_VMALLOC_SIZE H_KERN_MAP_SIZE +#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE) -/* - * 8TB IO mapping size - */ -#define H_KERN_IO_SIZE ASM_CONST(0x80000000000) /* 8T */ - -/* - * The vmalloc space starts at the beginning of the kernel non-linear virtual - * region, and occupies 504T (64K) or 56T (4K) - */ -#define H_VMALLOC_START H_KERN_VIRT_START -#define H_VMALLOC_SIZE (H_KERN_VIRT_SIZE - H_KERN_IO_SIZE) -#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE) +#define H_KERN_IO_START H_VMALLOC_END +#define H_KERN_IO_SIZE H_KERN_MAP_SIZE +#define H_KERN_IO_END (H_KERN_IO_START + H_KERN_IO_SIZE) -#define H_KERN_IO_START H_VMALLOC_END -#define H_KERN_IO_END (H_KERN_VIRT_START + H_KERN_VIRT_SIZE) +#define H_VMEMMAP_START H_KERN_IO_END +#define H_VMEMMAP_SIZE H_KERN_MAP_SIZE +#define H_VMEMMAP_END (H_VMEMMAP_START + H_VMEMMAP_SIZE) /* * Region IDs */ -#define REGION_SHIFT 60UL -#define REGION_MASK (0xfUL << REGION_SHIFT) -#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT) - -#define VMALLOC_REGION_ID (REGION_ID(H_VMALLOC_START)) -#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET)) -#define VMEMMAP_REGION_ID (0xfUL) /* Server only */ -#define USER_REGION_ID (0UL) +#define USER_REGION_ID 1 +#define KERNEL_REGION_ID 2 +#define VMALLOC_REGION_ID 3 +#define IO_REGION_ID 4 +#define VMEMMAP_REGION_ID 5 /* * Defines the address of the vmemap area, in its own region on * hash table CPUs. */ -#define H_VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT) #ifdef CONFIG_PPC_MM_SLICES #define HAVE_ARCH_UNMAPPED_AREA @@ -104,6 +111,26 @@ #define H_PUD_BAD_BITS (PMD_TABLE_SIZE-1) #ifndef __ASSEMBLY__ +static inline int get_region_id(unsigned long ea) +{ + int id = (ea >> 60UL); + + if (id == 0) + return USER_REGION_ID; + + VM_BUG_ON(id != 0xc); + VM_BUG_ON(ea >= H_VMEMMAP_END); + + if (ea >= H_VMEMMAP_START) + return VMEMMAP_REGION_ID; + else if (ea >= H_KERN_IO_START) + return IO_REGION_ID; + else if (ea >= H_VMALLOC_START) + return VMALLOC_REGION_ID; + + return KERNEL_REGION_ID; +} + #define hash__pmd_bad(pmd) (pmd_val(pmd) & H_PMD_BAD_BITS) #define hash__pud_bad(pud) (pud_val(pud) & H_PUD_BAD_BITS) static inline int hash__pgd_bad(pgd_t pgd) diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index eeb40091b46b..8a30bf189f10 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -588,7 +588,8 @@ extern void slb_set_size(u16 size); #endif #define MAX_VMALLOC_CTX_CNT 1 -#define MAX_MEMMAP_CTX_CNT 1 +#define MAX_IO_CTX_CNT 1 +#define MAX_VMEMMAP_CTX_CNT 1 /* * 256MB segment @@ -601,13 +602,10 @@ extern void slb_set_size(u16 size); * would give a protovsid of 0x1fffffffff. That will result in a VSID 0 * because of the modulo operation in vsid scramble. * - * We add one extra context to MIN_USER_CONTEXT so that we can map kernel - * context easily. The +1 is to map the unused 0xe region mapping. */ #define MAX_USER_CONTEXT ((ASM_CONST(1) << CONTEXT_BITS) - 2) #define MIN_USER_CONTEXT (MAX_KERNEL_CTX_CNT + MAX_VMALLOC_CTX_CNT + \ - MAX_MEMMAP_CTX_CNT + 2) - + MAX_IO_CTX_CNT + MAX_VMEMMAP_CTX_CNT) /* * For platforms that support on 65bit VA we limit the context bits */ @@ -776,7 +774,7 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea, /* * Bad address. We return VSID 0 for that */ - if ((ea & ~REGION_MASK) >= H_PGTABLE_RANGE) + if ((ea & EA_MASK) >= H_PGTABLE_RANGE) return 0; if (!mmu_has_feature(MMU_FTR_68_BIT_VA)) @@ -803,28 +801,29 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea, * 0x00002 - [ 0xc002000000000000 - 0xc003ffffffffffff] * 0x00003 - [ 0xc004000000000000 - 0xc005ffffffffffff] * 0x00004 - [ 0xc006000000000000 - 0xc007ffffffffffff] - - * 0x00005 - [ 0xd000000000000000 - 0xd001ffffffffffff ] - * 0x00006 - Not used - Can map 0xe000000000000000 range. - * 0x00007 - [ 0xf000000000000000 - 0xf001ffffffffffff ] * - * So we can compute the context from the region (top nibble) by - * subtracting 11, or 0xc - 1. + * vmap, IO, vmemap + * + * 0x00005 - [ 0xc008000000000000 - 0xc009ffffffffffff] + * 0x00006 - [ 0xc00a000000000000 - 0xc00bffffffffffff] + * 0x00007 - [ 0xc00c000000000000 - 0xc00dffffffffffff] + * */ static inline unsigned long get_kernel_context(unsigned long ea) { - unsigned long region_id = REGION_ID(ea); + unsigned long region_id = get_region_id(ea); unsigned long ctx; /* - * For linear mapping we do support multiple context + * Depending on Kernel config, kernel region can have one context + * or more. */ if (region_id == KERNEL_REGION_ID) { /* * We already verified ea to be not beyond the addr limit. */ - ctx = 1 + ((ea & ~REGION_MASK) >> MAX_EA_BITS_PER_CONTEXT); + ctx = 1 + ((ea & EA_MASK) >> MAX_EA_BITS_PER_CONTEXT); } else - ctx = (region_id - 0xc) + MAX_KERNEL_CTX_CNT; + ctx = region_id + MAX_KERNEL_CTX_CNT - 2; return ctx; } diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index f8ab18f77d1b..7dede2e34b70 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -279,7 +279,6 @@ extern unsigned long __kernel_virt_size; extern unsigned long __kernel_io_start; extern unsigned long __kernel_io_end; #define KERN_VIRT_START __kernel_virt_start -#define KERN_VIRT_SIZE __kernel_virt_size #define KERN_IO_START __kernel_io_start #define KERN_IO_END __kernel_io_end diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h index 6d760a083d62..574eca33f893 100644 --- a/arch/powerpc/include/asm/book3s/64/radix.h +++ b/arch/powerpc/include/asm/book3s/64/radix.h @@ -72,19 +72,17 @@ * | | * | | * | | - * +------------------------------+ Kernel IO map end (0xc010000000000000) + * +------------------------------+ Kernel vmemmap end (0xc010000000000000) * | | + * | 512TB | * | | - * | 1/2 of virtual map | + * +------------------------------+ Kernel IO map end/vmemap start * | | + * | 512TB | * | | - * +------------------------------+ Kernel IO map start + * +------------------------------+ Kernel vmap end/ IO map start * | | - * | 1/4 of virtual map | - * | | - * +------------------------------+ Kernel vmemap start - * | | - * | 1/4 of virtual map | + * | 512TB | * | | * +------------------------------+ Kernel virt start (0xc008000000000000) * | | @@ -93,25 +91,24 @@ * +------------------------------+ Kernel linear (0xc.....) */ -#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000) -#define RADIX_KERN_VIRT_SIZE ASM_CONST(0x0008000000000000) - +#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000) /* - * The vmalloc space starts at the beginning of that region, and - * occupies a quarter of it on radix config. - * (we keep a quarter for the virtual memmap) + * 49 = MAX_EA_BITS_PER_CONTEXT (hash specific). To make sure we pick + * the same value as hash. */ +#define RADIX_KERN_MAP_SIZE (1UL << 49) + #define RADIX_VMALLOC_START RADIX_KERN_VIRT_START -#define RADIX_VMALLOC_SIZE (RADIX_KERN_VIRT_SIZE >> 2) +#define RADIX_VMALLOC_SIZE RADIX_KERN_MAP_SIZE #define RADIX_VMALLOC_END (RADIX_VMALLOC_START + RADIX_VMALLOC_SIZE) -/* - * Defines the address of the vmemap area, in its own region on - * hash table CPUs. - */ -#define RADIX_VMEMMAP_BASE (RADIX_VMALLOC_END) -#define RADIX_KERN_IO_START (RADIX_KERN_VIRT_START + (RADIX_KERN_VIRT_SIZE >> 1)) -#define RADIX_KERN_IO_END (RADIX_KERN_VIRT_START + RADIX_KERN_VIRT_SIZE) +#define RADIX_KERN_IO_START RADIX_VMALLOC_END +#define RADIX_KERN_IO_SIZE RADIX_KERN_MAP_SIZE +#define RADIX_KERN_IO_END (RADIX_KERN_IO_START + RADIX_KERN_IO_SIZE) + +#define RADIX_VMEMMAP_START RADIX_KERN_IO_END +#define RADIX_VMEMMAP_SIZE RADIX_KERN_MAP_SIZE +#define RADIX_VMEMMAP_END (RADIX_VMEMMAP_START + RADIX_VMEMMAP_SIZE) #ifndef __ASSEMBLY__ #define RADIX_PTE_TABLE_SIZE (sizeof(pte_t) << RADIX_PTE_INDEX_SIZE) |