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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2016-05-17 09:02:43 +0200 |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-07-09 02:02:48 -0500 |
| commit | f86ef74ed9193c52411277eeac2eec69af553392 (patch) | |
| tree | 84c8ad083c2efc3a0688e56ab906cc49b2cc6e1d /arch/powerpc/kernel/asm-offsets.c | |
| parent | c223c90386bc2306510e0ceacd768a0123ff2a2f (diff) | |
| download | blackbird-op-linux-f86ef74ed9193c52411277eeac2eec69af553392.tar.gz blackbird-op-linux-f86ef74ed9193c52411277eeac2eec69af553392.zip | |
powerpc/8xx: Fix vaddr for IMMR early remap
Memory: 124428K/131072K available (3748K kernel code, 188K rwdata,
648K rodata, 508K init, 290K bss, 6644K reserved)
Kernel virtual memory layout:
* 0xfffdf000..0xfffff000 : fixmap
* 0xfde00000..0xfe000000 : consistent mem
* 0xfddf6000..0xfde00000 : early ioremap
* 0xc9000000..0xfddf6000 : vmalloc & ioremap
SLUB: HWalign=16, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Today, IMMR is mapped 1:1 at startup
Mapping IMMR 1:1 is just wrong because it may overlap with another
area. On most mpc8xx boards it is OK as IMMR is set to 0xff000000
but for instance on EP88xC board, IMMR is at 0xfa200000 which
overlaps with VM ioremap area
This patch fixes the virtual address for remapping IMMR with the fixmap
regardless of the value of IMMR.
The size of IMMR area is 256kbytes (CPM at offset 0, security engine
at offset 128k) so a 512k page is enough
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/kernel/asm-offsets.c')
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 047892869257..247f6407c7d8 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -68,6 +68,10 @@ #include "../mm/mmu_decl.h" #endif +#ifdef CONFIG_PPC_8xx +#include <asm/fixmap.h> +#endif + int main(void) { DEFINE(THREAD, offsetof(struct task_struct, thread)); @@ -749,5 +753,9 @@ int main(void) DEFINE(PPC_DBELL_SERVER, PPC_DBELL_SERVER); +#ifdef CONFIG_PPC_8xx + DEFINE(VIRT_IMMR_BASE, __fix_to_virt(FIX_IMMR_BASE)); +#endif + return 0; } |
