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Diffstat (limited to 'arch/powerpc/mm/fsl_booke_mmu.c')
-rw-r--r--arch/powerpc/mm/fsl_booke_mmu.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index 354ba3c09ef3..f3afe3d97f6b 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -141,8 +141,6 @@ static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
tlbcam_addrs[index].start = virt;
tlbcam_addrs[index].limit = virt + size - 1;
tlbcam_addrs[index].phys = phys;
-
- loadcam_entry(index);
}
unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
@@ -171,7 +169,8 @@ unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
}
static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
- unsigned long ram, int max_cam_idx)
+ unsigned long ram, int max_cam_idx,
+ bool dryrun)
{
int i;
unsigned long amount_mapped = 0;
@@ -181,13 +180,20 @@ static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
unsigned long cam_sz;
cam_sz = calc_cam_sz(ram, virt, phys);
- settlbcam(i, virt, phys, cam_sz, pgprot_val(PAGE_KERNEL_X), 0);
+ if (!dryrun)
+ settlbcam(i, virt, phys, cam_sz,
+ pgprot_val(PAGE_KERNEL_X), 0);
ram -= cam_sz;
amount_mapped += cam_sz;
virt += cam_sz;
phys += cam_sz;
}
+
+ if (dryrun)
+ return amount_mapped;
+
+ loadcam_multi(0, i, max_cam_idx);
tlbcam_index = i;
#ifdef CONFIG_PPC64
@@ -199,12 +205,12 @@ static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
return amount_mapped;
}
-unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx)
+unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, bool dryrun)
{
unsigned long virt = PAGE_OFFSET;
phys_addr_t phys = memstart_addr;
- return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx);
+ return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx, dryrun);
}
#ifdef CONFIG_PPC32
@@ -235,7 +241,7 @@ void __init adjust_total_lowmem(void)
ram = min((phys_addr_t)__max_low_memory, (phys_addr_t)total_lowmem);
i = switch_to_as1();
- __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM);
+ __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, false);
restore_to_as0(i, 0, 0, 1);
pr_info("Memory CAM mapping: ");
@@ -303,10 +309,12 @@ notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start)
n = switch_to_as1();
/* map a 64M area for the second relocation */
if (memstart_addr > start)
- map_mem_in_cams(0x4000000, CONFIG_LOWMEM_CAM_NUM);
+ map_mem_in_cams(0x4000000, CONFIG_LOWMEM_CAM_NUM,
+ false);
else
map_mem_in_cams_addr(start, PAGE_OFFSET + offset,
- 0x4000000, CONFIG_LOWMEM_CAM_NUM);
+ 0x4000000, CONFIG_LOWMEM_CAM_NUM,
+ false);
restore_to_as0(n, offset, __va(dt_ptr), 1);
/* We should never reach here */
panic("Relocation error");