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powerpc/fsl-booke-64: Don't limit ppc64_rma_size to one TLB entry

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This is required for kdump to work when loaded at at an address that
does not fall within the first TLB entry -- which can easily happen
because while the lower limit is enforced via reserved memory, which
doesn't affect how much is mapped, the upper limit is enforced via a
different mechanism that does.  Thus, more TLB entries are needed than
would normally be used, as the total memory to be mapped might not be a
power of two.

Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Scott Wood
2015-10-06 22:48:10 -05:00
parent d9e1831a42
commit eba5de8dc1
3 changed files with 34 additions and 15 deletions
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3
arch/powerpc/mm/mmu_decl.h
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@@ -141,7 +141,8 @@ extern void MMU_init_hw(void);
extern unsigned long mmu_mapin_ram(unsigned long top);
#elif defined(CONFIG_PPC_FSL_BOOK3E)
extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx);
extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
bool dryrun);
extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
phys_addr_t phys);
#ifdef CONFIG_PPC32