e7f75ad01d
This patch adds the base support for the 476 processor. The code was primarily written by Ben Herrenschmidt and Torez Smith, but I've been maintaining it for a while. The goal is to have a single binary that will run on 44x and 47x, but we still have some details to work out. The biggest is that the L1 cache line size differs on the two platforms, but it's currently a compile-time option. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Torez Smith <lnxtorez@linux.vnet.ibm.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
153 lines
5.5 KiB
C
153 lines
5.5 KiB
C
#ifndef _ASM_POWERPC_MMU_44X_H_
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#define _ASM_POWERPC_MMU_44X_H_
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/*
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* PPC440 support
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*/
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#include <asm/page.h>
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#define PPC44x_MMUCR_TID 0x000000ff
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#define PPC44x_MMUCR_STS 0x00010000
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#define PPC44x_TLB_PAGEID 0
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#define PPC44x_TLB_XLAT 1
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#define PPC44x_TLB_ATTRIB 2
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/* Page identification fields */
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#define PPC44x_TLB_EPN_MASK 0xfffffc00 /* Effective Page Number */
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#define PPC44x_TLB_VALID 0x00000200 /* Valid flag */
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#define PPC44x_TLB_TS 0x00000100 /* Translation address space */
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#define PPC44x_TLB_1K 0x00000000 /* Page sizes */
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#define PPC44x_TLB_4K 0x00000010
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#define PPC44x_TLB_16K 0x00000020
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#define PPC44x_TLB_64K 0x00000030
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#define PPC44x_TLB_256K 0x00000040
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#define PPC44x_TLB_1M 0x00000050
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#define PPC44x_TLB_16M 0x00000070
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#define PPC44x_TLB_256M 0x00000090
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/* Translation fields */
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#define PPC44x_TLB_RPN_MASK 0xfffffc00 /* Real Page Number */
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#define PPC44x_TLB_ERPN_MASK 0x0000000f
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/* Storage attribute and access control fields */
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#define PPC44x_TLB_ATTR_MASK 0x0000ff80
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#define PPC44x_TLB_U0 0x00008000 /* User 0 */
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#define PPC44x_TLB_U1 0x00004000 /* User 1 */
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#define PPC44x_TLB_U2 0x00002000 /* User 2 */
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#define PPC44x_TLB_U3 0x00001000 /* User 3 */
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#define PPC44x_TLB_W 0x00000800 /* Caching is write-through */
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#define PPC44x_TLB_I 0x00000400 /* Caching is inhibited */
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#define PPC44x_TLB_M 0x00000200 /* Memory is coherent */
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#define PPC44x_TLB_G 0x00000100 /* Memory is guarded */
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#define PPC44x_TLB_E 0x00000080 /* Memory is little endian */
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#define PPC44x_TLB_PERM_MASK 0x0000003f
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#define PPC44x_TLB_UX 0x00000020 /* User execution */
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#define PPC44x_TLB_UW 0x00000010 /* User write */
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#define PPC44x_TLB_UR 0x00000008 /* User read */
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#define PPC44x_TLB_SX 0x00000004 /* Super execution */
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#define PPC44x_TLB_SW 0x00000002 /* Super write */
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#define PPC44x_TLB_SR 0x00000001 /* Super read */
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/* Number of TLB entries */
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#define PPC44x_TLB_SIZE 64
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/* 47x bits */
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#define PPC47x_MMUCR_TID 0x0000ffff
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#define PPC47x_MMUCR_STS 0x00010000
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/* Page identification fields */
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#define PPC47x_TLB0_EPN_MASK 0xfffff000 /* Effective Page Number */
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#define PPC47x_TLB0_VALID 0x00000800 /* Valid flag */
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#define PPC47x_TLB0_TS 0x00000400 /* Translation address space */
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#define PPC47x_TLB0_4K 0x00000000
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#define PPC47x_TLB0_16K 0x00000010
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#define PPC47x_TLB0_64K 0x00000030
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#define PPC47x_TLB0_1M 0x00000070
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#define PPC47x_TLB0_16M 0x000000f0
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#define PPC47x_TLB0_256M 0x000001f0
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#define PPC47x_TLB0_1G 0x000003f0
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#define PPC47x_TLB0_BOLTED_R 0x00000008 /* tlbre only */
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/* Translation fields */
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#define PPC47x_TLB1_RPN_MASK 0xfffff000 /* Real Page Number */
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#define PPC47x_TLB1_ERPN_MASK 0x000003ff
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/* Storage attribute and access control fields */
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#define PPC47x_TLB2_ATTR_MASK 0x0003ff80
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#define PPC47x_TLB2_IL1I 0x00020000 /* Memory is guarded */
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#define PPC47x_TLB2_IL1D 0x00010000 /* Memory is guarded */
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#define PPC47x_TLB2_U0 0x00008000 /* User 0 */
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#define PPC47x_TLB2_U1 0x00004000 /* User 1 */
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#define PPC47x_TLB2_U2 0x00002000 /* User 2 */
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#define PPC47x_TLB2_U3 0x00001000 /* User 3 */
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#define PPC47x_TLB2_W 0x00000800 /* Caching is write-through */
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#define PPC47x_TLB2_I 0x00000400 /* Caching is inhibited */
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#define PPC47x_TLB2_M 0x00000200 /* Memory is coherent */
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#define PPC47x_TLB2_G 0x00000100 /* Memory is guarded */
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#define PPC47x_TLB2_E 0x00000080 /* Memory is little endian */
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#define PPC47x_TLB2_PERM_MASK 0x0000003f
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#define PPC47x_TLB2_UX 0x00000020 /* User execution */
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#define PPC47x_TLB2_UW 0x00000010 /* User write */
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#define PPC47x_TLB2_UR 0x00000008 /* User read */
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#define PPC47x_TLB2_SX 0x00000004 /* Super execution */
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#define PPC47x_TLB2_SW 0x00000002 /* Super write */
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#define PPC47x_TLB2_SR 0x00000001 /* Super read */
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#define PPC47x_TLB2_U_RWX (PPC47x_TLB2_UX|PPC47x_TLB2_UW|PPC47x_TLB2_UR)
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#define PPC47x_TLB2_S_RWX (PPC47x_TLB2_SX|PPC47x_TLB2_SW|PPC47x_TLB2_SR)
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#define PPC47x_TLB2_S_RW (PPC47x_TLB2_SW | PPC47x_TLB2_SR)
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#define PPC47x_TLB2_IMG (PPC47x_TLB2_I | PPC47x_TLB2_M | PPC47x_TLB2_G)
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#ifndef __ASSEMBLY__
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extern unsigned int tlb_44x_hwater;
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extern unsigned int tlb_44x_index;
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typedef struct {
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unsigned int id;
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unsigned int active;
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unsigned long vdso_base;
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} mm_context_t;
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#endif /* !__ASSEMBLY__ */
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#ifndef CONFIG_PPC_EARLY_DEBUG_44x
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#define PPC44x_EARLY_TLBS 1
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#else
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#define PPC44x_EARLY_TLBS 2
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#define PPC44x_EARLY_DEBUG_VIRTADDR (ASM_CONST(0xf0000000) \
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| (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
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#endif
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/* Size of the TLBs used for pinning in lowmem */
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#define PPC_PIN_SIZE (1 << 28) /* 256M */
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#if (PAGE_SHIFT == 12)
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#define PPC44x_TLBE_SIZE PPC44x_TLB_4K
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#define PPC47x_TLBE_SIZE PPC47x_TLB0_4K
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#define mmu_virtual_psize MMU_PAGE_4K
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#elif (PAGE_SHIFT == 14)
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#define PPC44x_TLBE_SIZE PPC44x_TLB_16K
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#define PPC47x_TLBE_SIZE PPC47x_TLB0_16K
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#define mmu_virtual_psize MMU_PAGE_16K
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#elif (PAGE_SHIFT == 16)
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#define PPC44x_TLBE_SIZE PPC44x_TLB_64K
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#define PPC47x_TLBE_SIZE PPC47x_TLB0_64K
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#define mmu_virtual_psize MMU_PAGE_64K
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#elif (PAGE_SHIFT == 18)
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#define PPC44x_TLBE_SIZE PPC44x_TLB_256K
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#define mmu_virtual_psize MMU_PAGE_256K
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#else
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#error "Unsupported PAGE_SIZE"
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#endif
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#define mmu_linear_psize MMU_PAGE_256M
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#define PPC44x_PGD_OFF_SHIFT (32 - PGDIR_SHIFT + PGD_T_LOG2)
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#define PPC44x_PGD_OFF_MASK_BIT (PGDIR_SHIFT - PGD_T_LOG2)
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#define PPC44x_PTE_ADD_SHIFT (32 - PGDIR_SHIFT + PTE_SHIFT + PTE_T_LOG2)
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#define PPC44x_PTE_ADD_MASK_BIT (32 - PTE_T_LOG2 - PTE_SHIFT)
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#endif /* _ASM_POWERPC_MMU_44X_H_ */
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