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authorMax Filippov <jcmvbkbc@gmail.com>2013-06-09 04:52:11 +0400
committerChris Zankel <chris@zankel.net>2013-07-08 01:18:56 -0700
commitc5a771d0678f9613e9f89cf1a5bdcfa5b08b225b (patch)
treec0d5ae3d94a0edb6edf9f1896ecb31666035d280 /arch/xtensa
parent661b40b0362c16b9969bf018636fb60454f62ee5 (diff)
downloadlinux-c5a771d0678f9613e9f89cf1a5bdcfa5b08b225b.tar.gz
xtensa: adjust boot parameters address when INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX is selected
The virtual address of boot parameters chain is passed to the kernel via a2 register. Adjust it in case it is remapped during MMUv3 -> MMUv2 mapping change, i.e. when it is in the first 128M. Also fix interpretation of initrd and FDT addresses passed in the boot parameters: these are physical addresses. Cc: stable@vger.kernel.org Reported-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/kernel/head.S9
-rw-r--r--arch/xtensa/kernel/setup.c6
2 files changed, 12 insertions, 3 deletions
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index ef12c0e6fa2..7d740ebbe19 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -68,6 +68,15 @@ _SetupMMU:
#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
initialize_mmu
+#if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+ rsr a2, excsave1
+ movi a3, 0x08000000
+ bgeu a2, a3, 1f
+ movi a3, 0xd0000000
+ add a2, a2, a3
+ wsr a2, excsave1
+1:
+#endif
#endif
.end no-absolute-literals
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 6dd25ecde3f..14c6c3a6f04 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -152,8 +152,8 @@ static int __init parse_tag_initrd(const bp_tag_t* tag)
{
meminfo_t* mi;
mi = (meminfo_t*)(tag->data);
- initrd_start = (void*)(mi->start);
- initrd_end = (void*)(mi->end);
+ initrd_start = __va(mi->start);
+ initrd_end = __va(mi->end);
return 0;
}
@@ -164,7 +164,7 @@ __tagtable(BP_TAG_INITRD, parse_tag_initrd);
static int __init parse_tag_fdt(const bp_tag_t *tag)
{
- dtb_start = (void *)(tag->data[0]);
+ dtb_start = __va(tag->data[0]);
return 0;
}