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153 lines
4.6 KiB
Diff
153 lines
4.6 KiB
Diff
From 961a1f1ccbb2121a4e650cd64ca1f5c15b232e18 Mon Sep 17 00:00:00 2001
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From: Kurt Mahan <kmahan@freescale.com>
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Date: Thu, 29 May 2008 22:03:08 -0600
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Subject: [PATCH] Update M547x/M548x memory map.
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- Move internal memory
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0xF0000000 MBAR
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0xF1000000 MMUBAR
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0xF3000000 RAMBAR0
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0xF3001000 RAMBAR1
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- Move KMAP area
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0xD0000000 -> 0xDFFFFFFF
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- Update pagefault code for KMAP area
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LTIBName: m547x-8x-move-memmap
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Signed-off-by: Kurt Mahan <kmahan@freescale.com>
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---
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arch/m68k/coldfire/head.S | 2 +-
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arch/m68k/mm/cf-mmu.c | 20 ++++++++++----------
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arch/m68k/mm/kmap.c | 18 +++++++++++++++---
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include/asm-m68k/coldfire.h | 8 ++++----
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include/asm-m68k/pgtable.h | 4 ++--
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5 files changed, 32 insertions(+), 20 deletions(-)
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--- a/arch/m68k/coldfire/head.S
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+++ b/arch/m68k/coldfire/head.S
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@@ -87,7 +87,7 @@
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#else
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#if defined(CONFIG_M54455)
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#elif defined(CONFIG_M547X_8X)
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-#define ACR0_DEFAULT #0xE000C040 /* ACR0 default value */
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+#define ACR0_DEFAULT #0xF00FC040 /* ACR0 default value */
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#define ACR1_DEFAULT #0x000FA008 /* ACR1 default value */
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#define ACR2_DEFAULT #0x00000000 /* ACR2 default value */
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#define ACR3_DEFAULT #0x000FA008 /* ACR3 default value */
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--- a/arch/m68k/mm/cf-mmu.c
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+++ b/arch/m68k/mm/cf-mmu.c
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@@ -35,11 +35,9 @@
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#include <asm/coldfire.h>
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#include <asm/tlbflush.h>
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-#if PAGE_OFFSET == CONFIG_SDRAM_BASE
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-#define KERNRAM(x) ((x >= PAGE_OFFSET) && (x < (PAGE_OFFSET + CONFIG_SDRAM_SIZE)))
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-#else
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-#define KERNRAM(x) (x >= PAGE_OFFSET)
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-#endif
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+#define KMAPAREA(x) ((x >= KMAP_START) && ( x < KMAP_END))
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+
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+#undef DEBUG
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mm_context_t next_mmu_context;
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unsigned long context_map[LAST_CONTEXT / BITS_PER_LONG + 1];
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@@ -162,7 +160,7 @@ int cf_tlb_miss(struct pt_regs *regs, in
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mmuar = ( dtlb ) ? regs->mmuar
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: regs->pc + (extension_word * sizeof(long));
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- mm = (!user_mode(regs) && KERNRAM(mmuar)) ? &init_mm : current->mm;
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+ mm = (!user_mode(regs) && KMAPAREA(mmuar)) ? &init_mm : current->mm;
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if (!mm) {
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local_irq_restore(flags);
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@@ -181,7 +179,7 @@ int cf_tlb_miss(struct pt_regs *regs, in
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return (-1);
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}
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- pte = (KERNRAM(mmuar)) ? pte_offset_kernel(pmd, mmuar)
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+ pte = (KMAPAREA(mmuar)) ? pte_offset_kernel(pmd, mmuar)
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: pte_offset_map(pmd, mmuar);
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if (pte_none(*pte) || !pte_present(*pte)) {
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local_irq_restore(flags);
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@@ -198,7 +196,7 @@ int cf_tlb_miss(struct pt_regs *regs, in
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set_pte(pte, pte_mkyoung(*pte));
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asid = mm->context & 0xff;
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- if (!pte_dirty(*pte) && !KERNRAM(mmuar))
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+ if (!pte_dirty(*pte) && !KMAPAREA(mmuar))
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set_pte(pte, pte_wrprotect(*pte));
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*MMUTR = (mmuar & PAGE_MASK) | (asid << CF_ASID_MMU_SHIFT)
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@@ -216,8 +214,10 @@ int cf_tlb_miss(struct pt_regs *regs, in
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asm("nop");
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- /*printk("cf_tlb_miss: va=%lx, pa=%lx\n", (mmuar & PAGE_MASK),
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- (pte_val(*pte) & PAGE_MASK));*/
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+#ifdef DEBUG
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+ printk("cf_tlb_miss: va=%lx, pa=%lx\n", (mmuar & PAGE_MASK),
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+ (pte_val(*pte) & PAGE_MASK));
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+#endif
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local_irq_restore(flags);
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return (0);
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}
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--- a/arch/m68k/mm/kmap.c
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+++ b/arch/m68k/mm/kmap.c
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@@ -135,10 +135,22 @@ void __iomem *__ioremap(unsigned long ph
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#ifdef CONFIG_M54455
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if (physaddr >= 0xf0000000) {
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- /* short circuit mappings for xf0000000 */
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-#ifdef DEBUG
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- printk(KERN_INFO "ioremap: short circuiting 0x%lx mapping\n", physaddr);
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+ /*
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+ * On the M5445x processors an ACR is setup to map
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+ * the 0xF0000000 range into kernel memory as
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+ * non-cacheable.
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+ */
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+ return (void __iomem *)physaddr;
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+ }
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#endif
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+
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+#ifdef CONFIG_M547X_8X
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+ if (physaddr >= 0xf0000000) {
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+ /*
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+ * On the M547x/M548x processors an ACR is setup to map
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+ * the 0xF0000000 range into kernel memory as
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+ * non-cacheable.
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+ */
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return (void __iomem *)physaddr;
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}
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#endif
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--- a/include/asm-m68k/coldfire.h
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+++ b/include/asm-m68k/coldfire.h
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@@ -6,10 +6,10 @@
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#define MCF_RAMBAR1 0x40000000
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#define MCF_SRAM 0x80000000
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#elif defined(CONFIG_M547X_8X)
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-#define MCF_MBAR 0xE0000000
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-#define MCF_MMUBAR 0xE1000000
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-#define MCF_RAMBAR0 0xE3000000
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-#define MCF_RAMBAR1 0xE3001000
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+#define MCF_MBAR 0xF0000000
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+#define MCF_MMUBAR 0xF1000000
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+#define MCF_RAMBAR0 0xF3000000
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+#define MCF_RAMBAR1 0xF3001000
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#endif
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#define MCF_CLK CONFIG_MCFCLK
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--- a/include/asm-m68k/pgtable.h
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+++ b/include/asm-m68k/pgtable.h
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@@ -73,8 +73,8 @@
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#define KMAP_START 0x0DC00000
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#define KMAP_END 0x0E000000
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#elif defined(CONFIG_COLDFIRE)
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-#define KMAP_START 0xe0000000
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-#define KMAP_END 0xf0000000
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+#define KMAP_START 0xd0000000
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+#define KMAP_END 0xe0000000
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#else
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#define KMAP_START 0xd0000000
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#define KMAP_END 0xf0000000
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