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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-09-06 20:47:54 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-10-01 16:40:58 +0100 |
| commit | 9e8b5199a753a2583a8ef8360e6428304a242283 (patch) | |
| tree | cfd065b410dd5fe5c14843b71368e0916a496739 /arch/arm/mm/proc-xscale.S | |
| parent | bb30f36f9b71c31dc8fe3483bba4c9884fc86080 (diff) | |
[ARM] Convert Xscale and Xscale3 to use new memory types
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/proc-xscale.S')
| -rw-r--r-- | arch/arm/mm/proc-xscale.S | 52 |
1 files changed, 28 insertions, 24 deletions
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 8d7512f9cba..6fa525364bb 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -406,8 +406,6 @@ ENTRY(cpu_xscale_dcache_clean_area) /* =============================== PageTable ============================== */ -#define PTE_CACHE_WRITE_ALLOCATE 0 - /* * cpu_xscale_switch_mm(pgd) * @@ -431,34 +429,40 @@ ENTRY(cpu_xscale_switch_mm) * * Errata 40: must set memory to write-through for user read-only pages. */ +cpu_xscale_mt_table: + .long 0x00 @ L_PTE_MT_UNCACHED + .long PTE_BUFFERABLE @ L_PTE_MT_BUFFERABLE + .long PTE_CACHEABLE @ L_PTE_MT_WRITETHROUGH + .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEBACK + .long 0x00 @ L_PTE_MT_DEV_SHARED + .long 0x00 @ L_PTE_MT_DEV_SHARED2 + .long PTE_EXT_TEX(1) | PTE_CACHEABLE @ L_PTE_MT_MINICACHE + .long PTE_EXT_TEX(1) | PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_WRITEALLOC + .long PTE_BUFFERABLE @ L_PTE_MT_DEV_WC2 + .long PTE_BUFFERABLE @ L_PTE_MT_DEV_WC + .long 0x00 @ unused + .long PTE_CACHEABLE | PTE_BUFFERABLE @ L_PTE_MT_DEV_CACHED + .long 0x00 @ L_PTE_MT_DEV_NONSHARED + .long PTE_EXT_TEX(1) | PTE_BUFFERABLE @ L_PTE_MT_DEV_IXP2000 + .long 0x00 @ unused + .long 0x00 @ unused + .align 5 ENTRY(cpu_xscale_set_pte_ext) xscale_set_pte_ext_prologue - @ - @ Handle the X bit. We want to set this bit for the minicache - @ (U = E = B = W = 0, C = 1) or when write allocate is enabled, - @ and we have a writeable, cacheable region. If we ignore the - @ U and E bits, we can allow user space to use the minicache as - @ well. - @ - @ X = (C & ~W & ~B) | (C & W & B & write_allocate) - @ - and ip, r1, #L_PTE_CACHEABLE | L_PTE_WRITE | L_PTE_BUFFERABLE - teq ip, #L_PTE_CACHEABLE -#if PTE_CACHE_WRITE_ALLOCATE - teqne ip, #L_PTE_CACHEABLE | L_PTE_WRITE | L_PTE_BUFFERABLE -#endif - orreq r2, r2, #PTE_EXT_TEX(1) @ - @ Erratum 40: The B bit must be cleared for a user read-only - @ cacheable page. - @ - @ B = B & ~(U & C & ~W) + @ Erratum 40: must set memory to write-through for user read-only pages @ - and ip, r1, #L_PTE_USER | L_PTE_WRITE | L_PTE_CACHEABLE - teq ip, #L_PTE_USER | L_PTE_CACHEABLE - biceq r2, r2, #PTE_BUFFERABLE + and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_WRITE) & ~(4 << 2) + teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER + + moveq r1, #L_PTE_MT_WRITETHROUGH + and r1, r1, #L_PTE_MT_MASK + adr ip, cpu_xscale_mt_table + ldr ip, [ip, r1] + bic r2, r2, #0x0c + orr r2, r2, ip xscale_set_pte_ext_epilogue mov pc, lr |