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authorMasakazu Mokuno <mokuno@sm.sony.co.jp>2008-08-21 06:18:56 +1000
committerPaul Mackerras <paulus@samba.org>2008-08-26 10:24:46 +1000
commitb47027795a22fe61f93de6010c120f26273fc693 (patch)
tree5656337fbada29bd6cdb8d7c8fcaa0372fd4ba8e
parent9cfeb74e93cf3549b7fa67ffe407192da625c777 (diff)
powerpc/ps3: Fix ioremap of spu shadow regs
Fix the ioremap of the spu shadow regs on the PS3. The current PS3 hypervisor requires the spu shadow regs to be mapped with the PTE page protection bits set as read-only (PP=3). This implementation uses the low level __ioremap() to bypass the page protection settings inforced by ioremap_flags() to get the needed PTE bits set for the shadow regs. This fixes a runtime failure on the PS3 introduced by the powerpc ioremap_prot rework of commit a1f242ff460e4b50a045fa237c3c56cce9eabf83 ("powerpc ioremap_prot"). Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/platforms/ps3/spu.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/ps3/spu.c b/arch/powerpc/platforms/ps3/spu.c
index d135cef9ed6..ccae3d446b9 100644
--- a/arch/powerpc/platforms/ps3/spu.c
+++ b/arch/powerpc/platforms/ps3/spu.c
@@ -186,14 +186,24 @@ static void spu_unmap(struct spu *spu)
iounmap(spu_pdata(spu)->shadow);
}
+/**
+ * setup_areas - Map the spu regions into the address space.
+ *
+ * The current HV requires the spu shadow regs to be mapped with the
+ * PTE page protection bits set as read-only (PP=3). This implementation
+ * uses the low level __ioremap() to bypass the page protection settings
+ * inforced by ioremap_flags() to get the needed PTE bits set for the
+ * shadow regs.
+ */
+
static int __init setup_areas(struct spu *spu)
{
struct table {char* name; unsigned long addr; unsigned long size;};
+ static const unsigned long shadow_flags = _PAGE_NO_CACHE | 3;
- spu_pdata(spu)->shadow = ioremap_flags(spu_pdata(spu)->shadow_addr,
- sizeof(struct spe_shadow),
- pgprot_val(PAGE_READONLY) |
- _PAGE_NO_CACHE);
+ spu_pdata(spu)->shadow = __ioremap(spu_pdata(spu)->shadow_addr,
+ sizeof(struct spe_shadow),
+ shadow_flags);
if (!spu_pdata(spu)->shadow) {
pr_debug("%s:%d: ioremap shadow failed\n", __func__, __LINE__);
goto fail_ioremap;