diff options
| -rw-r--r-- | arch/sh/kernel/cpu/sh4/probe.c | 34 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh4/sq.c | 6 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-sh4.c | 12 |
3 files changed, 31 insertions, 21 deletions
diff --git a/arch/sh/kernel/cpu/sh4/probe.c b/arch/sh/kernel/cpu/sh4/probe.c index 85ff48c1533a..2a7707a81d8f 100644 --- a/arch/sh/kernel/cpu/sh4/probe.c +++ b/arch/sh/kernel/cpu/sh4/probe.c @@ -3,7 +3,7 @@ * * CPU Subtype Probing for SH-4. * - * Copyright (C) 2001, 2002, 2003, 2004 Paul Mundt + * Copyright (C) 2001 - 2005 Paul Mundt * Copyright (C) 2003 Richard Curnow * * This file is subject to the terms and conditions of the GNU General Public @@ -53,9 +53,6 @@ int __init detect_cpu_and_cache_system(void) cpu_data->dcache.ways = 1; cpu_data->dcache.linesz = L1_CACHE_BYTES; - /* Set the FPU flag, virtually all SH-4's have one */ - cpu_data->flags |= CPU_HAS_FPU; - /* * Probe the underlying processor version/revision and * adjust cpu_data setup accordingly. @@ -63,26 +60,37 @@ int __init detect_cpu_and_cache_system(void) switch (pvr) { case 0x205: cpu_data->type = CPU_SH7750; - cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_PERF_COUNTER; + cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU | + CPU_HAS_PERF_COUNTER | CPU_HAS_PTEA; break; case 0x206: cpu_data->type = CPU_SH7750S; - cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_PERF_COUNTER; + cpu_data->flags |= CPU_HAS_P2_FLUSH_BUG | CPU_HAS_FPU | + CPU_HAS_PERF_COUNTER | CPU_HAS_PTEA; break; case 0x1100: cpu_data->type = CPU_SH7751; + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA; break; case 0x2000: cpu_data->type = CPU_SH73180; cpu_data->icache.ways = 4; cpu_data->dcache.ways = 4; - cpu_data->flags &= ~CPU_HAS_FPU; + + /* + * XXX: Double check this, none of the SH-4A/SH-4AL processors + * should have this, as it's essentially a legacy thing. + */ + cpu_data->flags |= CPU_HAS_PTEA; break; case 0x2001: case 0x2004: cpu_data->type = CPU_SH7770; cpu_data->icache.ways = 4; cpu_data->dcache.ways = 4; + + /* Same note as above applies here for PTEA */ + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA; break; case 0x2006: case 0x200A: @@ -90,27 +98,31 @@ int __init detect_cpu_and_cache_system(void) cpu_data->type = CPU_SH7781; else cpu_data->type = CPU_SH7780; + cpu_data->icache.ways = 4; cpu_data->dcache.ways = 4; + + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PERF_COUNTER; break; case 0x8000: cpu_data->type = CPU_ST40RA; + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA; break; case 0x8100: cpu_data->type = CPU_ST40GX1; + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA; break; case 0x700: cpu_data->type = CPU_SH4_501; cpu_data->icache.ways = 2; cpu_data->dcache.ways = 2; - - /* No FPU on the SH4-500 series.. */ - cpu_data->flags &= ~CPU_HAS_FPU; + cpu_data->flags |= CPU_HAS_PTEA; break; case 0x600: cpu_data->type = CPU_SH4_202; cpu_data->icache.ways = 2; cpu_data->dcache.ways = 2; + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA; break; case 0x500 ... 0x501: switch (prr) { @@ -128,6 +140,8 @@ int __init detect_cpu_and_cache_system(void) cpu_data->icache.ways = 2; cpu_data->dcache.ways = 2; + cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PTEA; + break; default: cpu_data->type = CPU_SH_NONE; diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c index 32c93b781b51..b148966dd7c7 100644 --- a/arch/sh/kernel/cpu/sh4/sq.c +++ b/arch/sh/kernel/cpu/sh4/sq.c @@ -166,9 +166,9 @@ static struct sq_mapping *__sq_remap(struct sq_mapping *map) ctrl_outl((pteh & MMU_VPN_MASK) | get_asid(), MMU_PTEH); ptel = map->addr & PAGE_MASK; -#ifndef CONFIG_CPU_SUBTYPE_SH7780 - ctrl_outl(((ptel >> 28) & 0xe) | (ptel & 0x1), MMU_PTEA); -#endif + + if (cpu_data->flags & CPU_HAS_PTEA) + ctrl_outl(((ptel >> 28) & 0xe) | (ptel & 0x1), MMU_PTEA); pgprot = pgprot_noncached(PAGE_KERNEL); diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c index 96e5fb0ac4fa..812b2d567de2 100644 --- a/arch/sh/mm/tlb-sh4.c +++ b/arch/sh/mm/tlb-sh4.c @@ -36,9 +36,6 @@ void update_mmu_cache(struct vm_area_struct * vma, unsigned long vpn; struct page *page; unsigned long pfn; -#ifndef CONFIG_CPU_SUBTYPE_SH7780 - unsigned long ptea; -#endif /* Ptrace may call this routine. */ if (vma && current->active_mm != vma->vm_mm) @@ -61,12 +58,11 @@ void update_mmu_cache(struct vm_area_struct * vma, ctrl_outl(vpn, MMU_PTEH); pteval = pte_val(pte); -#ifndef CONFIG_CPU_SUBTYPE_SH7780 + /* Set PTEA register */ - /* TODO: make this look less hacky */ - ptea = ((pteval >> 28) & 0xe) | (pteval & 0x1); - ctrl_outl(ptea, MMU_PTEA); -#endif + if (cpu_data->flags & CPU_HAS_PTEA) + /* TODO: make this look less hacky */ + ctrl_outl(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA); /* Set PTEL register */ pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */ |