diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 39 | ||||
| -rw-r--r-- | arch/powerpc/mm/mmu_decl.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/nohash/8xx.c | 15 | ||||
| -rw-r--r-- | arch/powerpc/platforms/8xx/Kconfig | 2 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/cpm_common.c | 2 |
5 files changed, 35 insertions, 27 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index c9e3d54e6a6f..d607f4b53e0f 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -749,6 +749,23 @@ start_here: rfi /* Load up the kernel context */ 2: +#ifdef CONFIG_PIN_TLB_IMMR + lis r0, MD_TWAM@h + oris r0, r0, 0x1f00 + mtspr SPRN_MD_CTR, r0 + LOAD_REG_IMMEDIATE(r0, VIRT_IMMR_BASE | MD_EVALID) + tlbie r0 + mtspr SPRN_MD_EPN, r0 + LOAD_REG_IMMEDIATE(r0, MD_SVALID | MD_PS512K | MD_GUARDED) + mtspr SPRN_MD_TWC, r0 + mfspr r0, SPRN_IMMR + rlwinm r0, r0, 0, 0xfff80000 + ori r0, r0, 0xf0 | _PAGE_DIRTY | _PAGE_SPS | _PAGE_SH | \ + _PAGE_NO_CACHE | _PAGE_PRESENT + mtspr SPRN_MD_RPN, r0 + lis r0, (MD_TWAM | MD_RSV4I)@h + mtspr SPRN_MD_CTR, r0 +#endif tlbia /* Clear all TLB entries */ sync /* wait for tlbia/tlbie to finish */ @@ -797,28 +814,6 @@ initial_mmu: ori r8, r8, MD_APG_INIT@l mtspr SPRN_MD_AP, r8 - /* Map a 512k page for the IMMR to get the processor - * internal registers (among other things). - */ -#ifdef CONFIG_PIN_TLB_IMMR - oris r10, r10, MD_RSV4I@h - ori r10, r10, 0x1c00 - mtspr SPRN_MD_CTR, r10 - - mfspr r9, 638 /* Get current IMMR */ - andis. r9, r9, 0xfff8 /* Get 512 kbytes boundary */ - - lis r8, VIRT_IMMR_BASE@h /* Create vaddr for TLB */ - ori r8, r8, MD_EVALID /* Mark it valid */ - mtspr SPRN_MD_EPN, r8 - li r8, MD_PS512K | MD_GUARDED /* Set 512k byte page */ - ori r8, r8, MD_SVALID /* Make it valid */ - mtspr SPRN_MD_TWC, r8 - mr r8, r9 /* Create paddr for TLB */ - ori r8, r8, MI_BOOTINIT|0x2 /* Inhibit cache -- Cort */ - mtspr SPRN_MD_RPN, r8 -#endif - /* Now map the lower RAM (up to 32 Mbytes) into the ITLB. */ #ifdef CONFIG_PIN_TLB_TEXT lis r8, MI_RSV4I@h diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index 7097e07a209a..1b6d39e9baed 100644 --- a/arch/powerpc/mm/mmu_decl.h +++ b/arch/powerpc/mm/mmu_decl.h @@ -182,6 +182,10 @@ static inline void mmu_mark_initmem_nx(void) { } static inline void mmu_mark_rodata_ro(void) { } #endif +#ifdef CONFIG_PPC_8xx +void __init mmu_mapin_immr(void); +#endif + #ifdef CONFIG_PPC_DEBUG_WX void ptdump_check_wx(void); #else diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c index b27017109a36..44cbde7612cb 100644 --- a/arch/powerpc/mm/nohash/8xx.c +++ b/arch/powerpc/mm/nohash/8xx.c @@ -66,7 +66,7 @@ void __init MMU_init_hw(void) if (IS_ENABLED(CONFIG_PIN_TLB_DATA)) { unsigned long ctr = mfspr(SPRN_MD_CTR) & 0xfe000000; unsigned long flags = 0xf0 | MD_SPS16K | _PAGE_SH | _PAGE_DIRTY; - int i = IS_ENABLED(CONFIG_PIN_TLB_IMMR) ? 29 : 28; + int i = 28; unsigned long addr = 0; unsigned long mem = total_lowmem; @@ -81,12 +81,19 @@ void __init MMU_init_hw(void) } } -static void __init mmu_mapin_immr(void) +static bool immr_is_mapped __initdata; + +void __init mmu_mapin_immr(void) { unsigned long p = PHYS_IMMR_BASE; unsigned long v = VIRT_IMMR_BASE; int offset; + if (immr_is_mapped) + return; + + immr_is_mapped = true; + for (offset = 0; offset < IMMR_SIZE; offset += PAGE_SIZE) map_kernel_page(v + offset, p + offset, PAGE_KERNEL_NCG); } @@ -122,9 +129,10 @@ unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top) { unsigned long mapped; + mmu_mapin_immr(); + if (__map_without_ltlbs) { mapped = 0; - mmu_mapin_immr(); if (!IS_ENABLED(CONFIG_PIN_TLB_IMMR)) patch_instruction_site(&patch__dtlbmiss_immr_jmp, ppc_inst(PPC_INST_NOP)); if (!IS_ENABLED(CONFIG_PIN_TLB_TEXT)) @@ -143,7 +151,6 @@ unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top) */ mmu_mapin_ram_chunk(0, einittext8, PAGE_KERNEL_X); mmu_mapin_ram_chunk(einittext8, mapped, PAGE_KERNEL); - mmu_mapin_immr(); } mmu_patch_cmp_limit(&patch__dtlbmiss_linmem_top, mapped); diff --git a/arch/powerpc/platforms/8xx/Kconfig b/arch/powerpc/platforms/8xx/Kconfig index 0d036cd868ef..04ea1a8a0bdc 100644 --- a/arch/powerpc/platforms/8xx/Kconfig +++ b/arch/powerpc/platforms/8xx/Kconfig @@ -187,7 +187,7 @@ config PIN_TLB_DATA config PIN_TLB_IMMR bool "Pinned TLB for IMMR" - depends on PIN_TLB || PPC_EARLY_DEBUG_CPM + depends on PIN_TLB default y help This pins the IMMR area with a 512kbytes page. In case diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c index 71660bacb264..7dc1960f8bdb 100644 --- a/arch/powerpc/sysdev/cpm_common.c +++ b/arch/powerpc/sysdev/cpm_common.c @@ -68,6 +68,8 @@ static void udbg_putc_cpm(char c) void __init udbg_init_cpm(void) { #ifdef CONFIG_PPC_8xx + mmu_mapin_immr(); + cpm_udbg_txdesc = (u32 __iomem __force *) (CONFIG_PPC_EARLY_DEBUG_CPM_ADDR - PHYS_IMMR_BASE + VIRT_IMMR_BASE); |