diff options
| author | Kevin Hao <haokexin@gmail.com> | 2013-12-24 15:12:11 +0800 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-01-09 17:52:18 -0600 |
| commit | 0be7d969b0efef085ed6497d462ba16a875ca737 (patch) | |
| tree | c2cf4e6760102757785a0d91fcb052372153e9c7 /arch/powerpc/mm/fsl_booke_mmu.c | |
| parent | 7d2471f9fa85089beb1cb9436ffc28f9e11e518d (diff) | |
| download | linux-0be7d969b0efef085ed6497d462ba16a875ca737.tar.bz2 | |
powerpc/fsl_booke: smp support for booting a relocatable kernel above 64M
When booting above the 64M for a secondary cpu, we also face the
same issue as the boot cpu that the PAGE_OFFSET map two different
physical address for the init tlb and the final map. So we have to use
switch_to_as1/restore_to_as0 between the conversion of these two
maps. When restoring to as0 for a secondary cpu, we only need to
return to the caller. So add a new parameter for function
restore_to_as0 for this purpose.
Use LOAD_REG_ADDR_PIC to get the address of variables which may
be used before we set the final map in cams for the secondary cpu.
Move the setting of cams a bit earlier in order to avoid the
unnecessary using of LOAD_REG_ADDR_PIC.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/mm/fsl_booke_mmu.c')
| -rw-r--r-- | arch/powerpc/mm/fsl_booke_mmu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c index 95deb9fdf92f..a68671c18ad4 100644 --- a/arch/powerpc/mm/fsl_booke_mmu.c +++ b/arch/powerpc/mm/fsl_booke_mmu.c @@ -231,7 +231,7 @@ void __init adjust_total_lowmem(void) i = switch_to_as1(); __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM); - restore_to_as0(i, 0, 0); + restore_to_as0(i, 0, 0, 1); pr_info("Memory CAM mapping: "); for (i = 0; i < tlbcam_index - 1; i++) @@ -302,7 +302,7 @@ notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start) else map_mem_in_cams_addr(start, PAGE_OFFSET + offset, 0x4000000, CONFIG_LOWMEM_CAM_NUM); - restore_to_as0(n, offset, __va(dt_ptr)); + restore_to_as0(n, offset, __va(dt_ptr), 1); /* We should never reach here */ panic("Relocation error"); } |