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62 lines
2.0 KiB
Diff
62 lines
2.0 KiB
Diff
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From ed9d4b88136173a4e17701d9c1162ddfecf902e4 Mon Sep 17 00:00:00 2001
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From: Kurt Mahan <kmahan@freescale.com>
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Date: Mon, 19 Nov 2007 15:24:30 -0700
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Subject: [PATCH] Short circuit IOREMAP calls in the 0xF0000000 range.
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LTIBName: m5445x-ioremap-xf0000000
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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 | 4 ++--
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arch/m68k/mm/kmap.c | 14 ++++++++++++--
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2 files changed, 14 insertions(+), 4 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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@@ -56,13 +56,13 @@
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* Setup ACR mappings to provide the following memory map:
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* Data
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* 0xA0000000 -> 0xAFFFFFFF [0] NO CACHE / PRECISE / SUPER ONLY
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- * 0xFC000000 -> 0xFCFFFFFF [1] NO CACHE / PRECISE / SUPER ONLY
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+ * 0xF0000000 -> 0xFFFFFFFF [1] NO CACHE / PRECISE / SUPER ONLY
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* Code
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* None currently (mapped via TLBs)
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*/
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#define ACR0_DEFAULT #0xA00FA048 /* ACR0 default value */
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-#define ACR1_DEFAULT #0xFC00A040 /* ACR1 default value */
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+#define ACR1_DEFAULT #0xF00FA040 /* ACR1 default value */
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#define ACR2_DEFAULT #0x00000000 /* ACR2 default value */
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#define ACR3_DEFAULT #0x00000000 /* ACR3 default value */
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--- a/arch/m68k/mm/kmap.c
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+++ b/arch/m68k/mm/kmap.c
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@@ -133,8 +133,18 @@ void __iomem *__ioremap(unsigned long ph
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}
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#endif
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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("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);
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+ printk(KERN_INFO "ioremap: short circuiting 0x%lx mapping\n", physaddr);
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+#endif
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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 DEBUG
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+ printk("ioremap: paddr=0x%lx,size=0x%lx(%d) - ", physaddr, size, cacheflag);
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#endif
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/*
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* Mappings have to be aligned
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@@ -153,7 +163,7 @@ void __iomem *__ioremap(unsigned long ph
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virtaddr = (unsigned long)area->addr;
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retaddr = virtaddr + offset;
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#ifdef DEBUG
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- printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);
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+ printk(" paddr=0x%lx,vaddr=0x%lx,retaddr=0x%lx", physaddr, virtaddr, retaddr);
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#endif
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/*
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