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authorThiemo Seufer <ths@networkno.de>2005-04-01 14:07:13 +0000
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:31:00 +0100
commit1b3a6e975cbe81c5abc55e4c1b9f5b5250c5f20e (patch)
tree541db3912172f82d30244cf215b1a1b91d8c6f7f
parent7c2740f1c1a7ff2767a92042f39edad7fad95c92 (diff)
Fix 64bit SMP TLB handler and stack frame handling, optimize 32bit SMP
TLB handlers a bit, match definitions in pgtable-{32,64}.h better. Signed-off-by: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/kernel/head.S1
-rw-r--r--arch/mips/mm/tlbex.c50
-rw-r--r--include/asm-mips/mmu_context.h4
-rw-r--r--include/asm-mips/pgtable-64.h10
-rw-r--r--include/asm-mips/stackframe.h10
5 files changed, 34 insertions, 41 deletions
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 124c27e908f..9f692716935 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -157,6 +157,7 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
LONG_S a2, fw_arg2
LONG_S a3, fw_arg3
+ MTC0 zero, CP0_CONTEXT # clear context register
PTR_LA $28, init_thread_union
PTR_ADDIU sp, $28, _THREAD_SIZE - 32
set_saved_sp sp, t0, t1
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index bcf87a2b554..018f7527a72 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -91,7 +91,7 @@ enum opcode {
insn_addu, insn_addiu, insn_and, insn_andi, insn_beq,
insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
insn_bne, insn_daddu, insn_daddiu, insn_dmfc0, insn_dmtc0,
- insn_dsll, insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32,
+ insn_dsll, insn_dsll32, insn_dsra, insn_dsrl,
insn_dsubu, insn_eret, insn_j, insn_jal, insn_jr, insn_ld,
insn_ll, insn_lld, insn_lui, insn_lw, insn_mfc0, insn_mtc0,
insn_ori, insn_rfe, insn_sc, insn_scd, insn_sd, insn_sll,
@@ -134,7 +134,6 @@ static __initdata struct insn insn_table[] = {
{ insn_dsll32, M(spec_op,0,0,0,0,dsll32_op), RT | RD | RE },
{ insn_dsra, M(spec_op,0,0,0,0,dsra_op), RT | RD | RE },
{ insn_dsrl, M(spec_op,0,0,0,0,dsrl_op), RT | RD | RE },
- { insn_dsrl32, M(spec_op,0,0,0,0,dsrl32_op), RT | RD | RE },
{ insn_dsubu, M(spec_op,0,0,0,0,dsubu_op), RS | RT | RD },
{ insn_eret, M(cop0_op,cop_op,0,0,0,eret_op), 0 },
{ insn_j, M(j_op,0,0,0,0,0), JIMM },
@@ -366,7 +365,6 @@ I_u2u1u3(_dsll);
I_u2u1u3(_dsll32);
I_u2u1u3(_dsra);
I_u2u1u3(_dsrl);
-I_u2u1u3(_dsrl32);
I_u3u1u2(_dsubu);
I_0(_eret);
I_u1(_j);
@@ -944,34 +942,29 @@ build_get_pmde64(u32 **p, struct label **l, struct reloc **r,
/* No i_nop needed here, since the next insn doesn't touch TMP. */
#ifdef CONFIG_SMP
+# ifdef CONFIG_BUILD_ELF64
/*
- * 64 bit SMP has the lower part of &pgd_current[smp_processor_id()]
+ * 64 bit SMP running in XKPHYS has smp_processor_id() << 3
* stored in CONTEXT.
*/
- if (in_compat_space_p(pgdc)) {
- i_dmfc0(p, ptr, C0_CONTEXT);
- i_dsra(p, ptr, ptr, 23);
- i_ld(p, ptr, 0, ptr);
- } else {
-#ifdef CONFIG_BUILD_ELF64
- i_dmfc0(p, ptr, C0_CONTEXT);
- i_dsrl(p, ptr, ptr, 23);
- i_dsll(p, ptr, ptr, 3);
- i_LA_mostly(p, tmp, pgdc);
- i_daddu(p, ptr, ptr, tmp);
- i_dmfc0(p, tmp, C0_BADVADDR);
- i_ld(p, ptr, rel_lo(pgdc), ptr);
-#else
- i_dmfc0(p, ptr, C0_CONTEXT);
- i_lui(p, tmp, rel_highest(pgdc));
- i_dsll(p, ptr, ptr, 9);
- i_daddiu(p, tmp, tmp, rel_higher(pgdc));
- i_dsrl32(p, ptr, ptr, 0);
- i_and(p, ptr, ptr, tmp);
- i_dmfc0(p, tmp, C0_BADVADDR);
- i_ld(p, ptr, 0, ptr);
-#endif
- }
+ i_dmfc0(p, ptr, C0_CONTEXT);
+ i_dsrl(p, ptr, ptr, 23);
+ i_LA_mostly(p, tmp, pgdc);
+ i_daddu(p, ptr, ptr, tmp);
+ i_dmfc0(p, tmp, C0_BADVADDR);
+ i_ld(p, ptr, rel_lo(pgdc), ptr);
+# else
+ /*
+ * 64 bit SMP running in compat space has the lower part of
+ * &pgd_current[smp_processor_id()] stored in CONTEXT.
+ */
+ if (!in_compat_space_p(pgdc))
+ panic("Invalid page directory address!");
+
+ i_dmfc0(p, ptr, C0_CONTEXT);
+ i_dsra(p, ptr, ptr, 23);
+ i_ld(p, ptr, 0, ptr);
+# endif
#else
i_LA_mostly(p, ptr, pgdc);
i_ld(p, ptr, rel_lo(pgdc), ptr);
@@ -1028,7 +1021,6 @@ build_get_pgde32(u32 **p, unsigned int tmp, unsigned int ptr)
i_mfc0(p, ptr, C0_CONTEXT);
i_LA_mostly(p, tmp, pgdc);
i_srl(p, ptr, ptr, 23);
- i_sll(p, ptr, ptr, 2);
i_addu(p, ptr, tmp, ptr);
#else
i_LA_mostly(p, ptr, pgdc);
diff --git a/include/asm-mips/mmu_context.h b/include/asm-mips/mmu_context.h
index 45cd72d172e..19cdf7642e6 100644
--- a/include/asm-mips/mmu_context.h
+++ b/include/asm-mips/mmu_context.h
@@ -30,7 +30,7 @@ extern unsigned long pgd_current[];
#ifdef CONFIG_32BIT
#define TLBMISS_HANDLER_SETUP() \
- write_c0_context((unsigned long) smp_processor_id() << 23); \
+ write_c0_context((unsigned long) smp_processor_id() << 25); \
TLBMISS_HANDLER_SETUP_PGD(swapper_pg_dir)
#endif
#if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
@@ -40,7 +40,7 @@ extern unsigned long pgd_current[];
#endif
#if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
#define TLBMISS_HANDLER_SETUP() \
- write_c0_context((unsigned long) smp_processor_id() << 23); \
+ write_c0_context((unsigned long) smp_processor_id() << 26); \
TLBMISS_HANDLER_SETUP_PGD(swapper_pg_dir)
#endif
diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h
index 35007250ac2..3e0a522c0f0 100644
--- a/include/asm-mips/pgtable-64.h
+++ b/include/asm-mips/pgtable-64.h
@@ -114,7 +114,7 @@ extern pmd_t invalid_pmd_table[PTRS_PER_PMD];
extern pmd_t empty_bad_pmd_table[PTRS_PER_PMD];
/*
- * Empty pmd entries point to the invalid_pte_table.
+ * Empty pgd/pmd entries point to the invalid_pte_table.
*/
static inline int pmd_none(pmd_t pmd)
{
@@ -156,7 +156,8 @@ static inline void pud_clear(pud_t *pudp)
pud_val(*pudp) = ((unsigned long) invalid_pmd_table);
}
-#define pte_page(x) pfn_to_page((unsigned long)((pte_val(x) >> PAGE_SHIFT)))
+#define pte_page(x) pfn_to_page(pte_pfn(x))
+
#ifdef CONFIG_CPU_VR41XX
#define pte_pfn(x) ((unsigned long)((x).pte >> (PAGE_SHIFT + 2)))
#define pfn_pte(pfn, prot) __pte(((pfn) << (PAGE_SHIFT + 2)) | pgprot_val(prot))
@@ -167,12 +168,14 @@ static inline void pud_clear(pud_t *pudp)
#define __pgd_offset(address) pgd_index(address)
#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
+#define __pmd_offset(address) pmd_index(address)
#define page_pte(page) page_pte_prot(page, __pgprot(0))
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(address) pgd_offset(&init_mm, 0)
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
/* to find an entry in a page-table-directory */
#define pgd_offset(mm,addr) ((mm)->pgd + pgd_index(addr))
@@ -185,8 +188,7 @@ static inline unsigned long pud_page(pud_t pud)
/* Find an entry in the second-level page table.. */
static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address)
{
- return (pmd_t *) pud_page(*pud) +
- ((address >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
+ return (pmd_t *) pud_page(*pud) + pmd_index(address);
}
/* Find an entry in the third-level page table.. */
diff --git a/include/asm-mips/stackframe.h b/include/asm-mips/stackframe.h
index e33e302c342..de303e96260 100644
--- a/include/asm-mips/stackframe.h
+++ b/include/asm-mips/stackframe.h
@@ -60,7 +60,6 @@
mfc0 k0, CP0_CONTEXT
lui k1, %hi(kernelsp)
srl k0, k0, 23
- sll k0, k0, 2
addu k1, k0
LONG_L k1, %lo(kernelsp)(k1)
#endif
@@ -76,12 +75,12 @@
#endif
#if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
MFC0 k1, CP0_CONTEXT
- dsrl k1, 23
- dsll k1, k1, 3
lui k0, %highest(kernelsp)
+ dsrl k1, 23
daddiu k0, %higher(kernelsp)
dsll k0, k0, 16
daddiu k0, %hi(kernelsp)
+ dsll k0, k0, 16
daddu k1, k1, k0
LONG_L k1, %lo(kernelsp)(k1)
#endif
@@ -91,7 +90,6 @@
#ifdef CONFIG_32BIT
mfc0 \temp, CP0_CONTEXT
srl \temp, 23
- sll \temp, 2
LONG_S \stackp, kernelsp(\temp)
#endif
#if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
@@ -102,8 +100,8 @@
LONG_S \stackp, %lo(kernelsp)(\temp)
#endif
#if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
- lw \temp, TI_CPU(gp)
- dsll \temp, 3
+ MFC0 \temp, CP0_CONTEXT
+ dsrl \temp, 23
LONG_S \stackp, kernelsp(\temp)
#endif
.endm