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Diffstat (limited to 'arch/powerpc/platforms/ps3/spu.c')
-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;