From 55fd766b5fad8240b7a6e994b5779a46d28f73d4 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Fri, 16 Oct 2009 18:48:40 -0500 Subject: powerpc/fsl-booke64: Use TLB CAMs to cover linear mapping on FSL 64-bit chips On Freescale parts typically have TLB array for large mappings that we can bolt the linear mapping into. We utilize the code that already exists on PPC32 on the 64-bit side to setup the linear mapping to be cover by bolted TLB entries. We utilize a quarter of the variable size TLB array for this purpose. Additionally, we limit the amount of memory to what we can cover via bolted entries so we don't get secondary faults in the TLB miss handlers. We should fix this limitation in the future. Signed-off-by: Kumar Gala --- arch/powerpc/mm/mmu_decl.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/mm/mmu_decl.h') diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index 63b84a0d3b10..dd0a2589591d 100644 --- a/arch/powerpc/mm/mmu_decl.h +++ b/arch/powerpc/mm/mmu_decl.h @@ -140,10 +140,13 @@ extern void wii_memory_fixups(void); extern void MMU_init_hw(void); extern unsigned long mmu_mapin_ram(unsigned long top); -#elif defined(CONFIG_FSL_BOOKE) +#elif defined(CONFIG_PPC_FSL_BOOK3E) +extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx); +#ifdef CONFIG_PPC32 extern void MMU_init_hw(void); extern unsigned long mmu_mapin_ram(unsigned long top); extern void adjust_total_lowmem(void); +#endif extern void loadcam_entry(unsigned int index); struct tlbcam { -- cgit v1.2.2