- 根目录:
- arch
- powerpc
- include
- asm
- mmu-44x.h
#ifndef _ASM_POWERPC_MMU_44X_H_
#define _ASM_POWERPC_MMU_44X_H_
/*
* PPC440 support
*/
#include <asm/page.h>
#define PPC44x_MMUCR_TID 0x000000ff
#define PPC44x_MMUCR_STS 0x00010000
#define PPC44x_TLB_PAGEID 0
#define PPC44x_TLB_XLAT 1
#define PPC44x_TLB_ATTRIB 2
/* Page identification fields */
#define PPC44x_TLB_EPN_MASK 0xfffffc00 /* Effective Page Number */
#define PPC44x_TLB_VALID 0x00000200 /* Valid flag */
#define PPC44x_TLB_TS 0x00000100 /* Translation address space */
#define PPC44x_TLB_1K 0x00000000 /* Page sizes */
#define PPC44x_TLB_4K 0x00000010
#define PPC44x_TLB_16K 0x00000020
#define PPC44x_TLB_64K 0x00000030
#define PPC44x_TLB_256K 0x00000040
#define PPC44x_TLB_1M 0x00000050
#define PPC44x_TLB_16M 0x00000070
#define PPC44x_TLB_256M 0x00000090
/* Translation fields */
#define PPC44x_TLB_RPN_MASK 0xfffffc00 /* Real Page Number */
#define PPC44x_TLB_ERPN_MASK 0x0000000f
/* Storage attribute and access control fields */
#define PPC44x_TLB_ATTR_MASK 0x0000ff80
#define PPC44x_TLB_U0 0x00008000 /* User 0 */
#define PPC44x_TLB_U1 0x00004000 /* User 1 */
#define PPC44x_TLB_U2 0x00002000 /* User 2 */
#define PPC44x_TLB_U3 0x00001000 /* User 3 */
#define PPC44x_TLB_W 0x00000800 /* Caching is write-through */
#define PPC44x_TLB_I 0x00000400 /* Caching is inhibited */
#define PPC44x_TLB_M 0x00000200 /* Memory is coherent */
#define PPC44x_TLB_G 0x00000100 /* Memory is guarded */
#define PPC44x_TLB_E 0x00000080 /* Memory is little endian */
#define PPC44x_TLB_PERM_MASK 0x0000003f
#define PPC44x_TLB_UX 0x00000020 /* User execution */
#define PPC44x_TLB_UW 0x00000010 /* User write */
#define PPC44x_TLB_UR 0x00000008 /* User read */
#define PPC44x_TLB_SX 0x00000004 /* Super execution */
#define PPC44x_TLB_SW 0x00000002 /* Super write */
#define PPC44x_TLB_SR 0x00000001 /* Super read */
/* Number of TLB entries */
#define PPC44x_TLB_SIZE 64
/* 47x bits */
#define PPC47x_MMUCR_TID 0x0000ffff
#define PPC47x_MMUCR_STS 0x00010000
/* Page identification fields */
#define PPC47x_TLB0_EPN_MASK 0xfffff000 /* Effective Page Number */
#define PPC47x_TLB0_VALID 0x00000800 /* Valid flag */
#define PPC47x_TLB0_TS 0x00000400 /* Translation address space */
#define PPC47x_TLB0_4K 0x00000000
#define PPC47x_TLB0_16K 0x00000010
#define PPC47x_TLB0_64K 0x00000030
#define PPC47x_TLB0_1M 0x00000070
#define PPC47x_TLB0_16M 0x000000f0
#define PPC47x_TLB0_256M 0x000001f0
#define PPC47x_TLB0_1G 0x000003f0
#define PPC47x_TLB0_BOLTED_R 0x00000008 /* tlbre only */
/* Translation fields */
#define PPC47x_TLB1_RPN_MASK 0xfffff000 /* Real Page Number */
#define PPC47x_TLB1_ERPN_MASK 0x000003ff
/* Storage attribute and access control fields */
#define PPC47x_TLB2_ATTR_MASK 0x0003ff80
#define PPC47x_TLB2_IL1I 0x00020000 /* Memory is guarded */
#define PPC47x_TLB2_IL1D 0x00010000 /* Memory is guarded */
#define PPC47x_TLB2_U0 0x00008000 /* User 0 */
#define PPC47x_TLB2_U1 0x00004000 /* User 1 */
#define PPC47x_TLB2_U2 0x00002000 /* User 2 */
#define PPC47x_TLB2_U3 0x00001000 /* User 3 */
#define PPC47x_TLB2_W 0x00000800 /* Caching is write-through */
#define PPC47x_TLB2_I 0x00000400 /* Caching is inhibited */
#define PPC47x_TLB2_M 0x00000200 /* Memory is coherent */
#define PPC47x_TLB2_G 0x00000100 /* Memory is guarded */
#define PPC47x_TLB2_E 0x00000080 /* Memory is little endian */
#define PPC47x_TLB2_PERM_MASK 0x0000003f
#define PPC47x_TLB2_UX 0x00000020 /* User execution */
#define PPC47x_TLB2_UW 0x00000010 /* User write */
#define PPC47x_TLB2_UR 0x00000008 /* User read */
#define PPC47x_TLB2_SX 0x00000004 /* Super execution */
#define PPC47x_TLB2_SW 0x00000002 /* Super write */
#define PPC47x_TLB2_SR 0x00000001 /* Super read */
#define PPC47x_TLB2_U_RWX (PPC47x_TLB2_UX|PPC47x_TLB2_UW|PPC47x_TLB2_UR)
#define PPC47x_TLB2_S_RWX (PPC47x_TLB2_SX|PPC47x_TLB2_SW|PPC47x_TLB2_SR)
#define PPC47x_TLB2_S_RW (PPC47x_TLB2_SW | PPC47x_TLB2_SR)
#define PPC47x_TLB2_IMG (PPC47x_TLB2_I | PPC47x_TLB2_M | PPC47x_TLB2_G)
#ifndef __ASSEMBLY__
extern unsigned int tlb_44x_hwater;
extern unsigned int tlb_44x_index;
typedef struct {
unsigned int id;
unsigned int active;
unsigned long vdso_base;
} mm_context_t;
#endif /* !__ASSEMBLY__ */
#ifndef CONFIG_PPC_EARLY_DEBUG_44x
#define PPC44x_EARLY_TLBS 1
#else
#define PPC44x_EARLY_TLBS 2
#define PPC44x_EARLY_DEBUG_VIRTADDR (ASM_CONST(0xf0000000) \
| (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
#endif
/* Size of the TLBs used for pinning in lowmem */
#define PPC_PIN_SIZE (1 << 28) /* 256M */
#if (PAGE_SHIFT == 12)
#define PPC44x_TLBE_SIZE PPC44x_TLB_4K
#define PPC47x_TLBE_SIZE PPC47x_TLB0_4K
#define mmu_virtual_psize MMU_PAGE_4K
#elif (PAGE_SHIFT == 14)
#define PPC44x_TLBE_SIZE PPC44x_TLB_16K
#define PPC47x_TLBE_SIZE PPC47x_TLB0_16K
#define mmu_virtual_psize MMU_PAGE_16K
#elif (PAGE_SHIFT == 16)
#define PPC44x_TLBE_SIZE PPC44x_TLB_64K
#define PPC47x_TLBE_SIZE PPC47x_TLB0_64K
#define mmu_virtual_psize MMU_PAGE_64K
#elif (PAGE_SHIFT == 18)
#define PPC44x_TLBE_SIZE PPC44x_TLB_256K
#define mmu_virtual_psize MMU_PAGE_256K
#else
#error "Unsupported PAGE_SIZE"
#endif
#define mmu_linear_psize MMU_PAGE_256M
#define PPC44x_PGD_OFF_SHIFT (32 - PGDIR_SHIFT + PGD_T_LOG2)
#define PPC44x_PGD_OFF_MASK_BIT (PGDIR_SHIFT - PGD_T_LOG2)
#define PPC44x_PTE_ADD_SHIFT (32 - PGDIR_SHIFT + PTE_SHIFT + PTE_T_LOG2)
#define PPC44x_PTE_ADD_MASK_BIT (32 - PTE_T_LOG2 - PTE_SHIFT)
#endif /* _ASM_POWERPC_MMU_44X_H_ */