From 94e9411b9dda182dd63d53ba6ea640c98b35db5f Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Thu, 12 Nov 2009 10:26:16 -0600 Subject: ppc/85xx: Add tracking of TLB CAM usage We need to track which TLB CAM entries are used to allow us to "dynamically" allocate entries later in the code. For example the SPD DDR code today hard codes which TLB entries it uses. We can now make that pick entries that are free. Signed-off-by: Kumar Gala --- include/asm-ppc/config.h | 7 +++++++ include/asm-ppc/global_data.h | 3 +++ include/asm-ppc/mmu.h | 2 ++ 3 files changed, 12 insertions(+) (limited to 'include/asm-ppc') diff --git a/include/asm-ppc/config.h b/include/asm-ppc/config.h index d5f82b44f..796707eaf 100644 --- a/include/asm-ppc/config.h +++ b/include/asm-ppc/config.h @@ -63,6 +63,13 @@ #define CONFIG_TSECV2 #endif +/* Number of TLB CAM entries we have on FSL Book-E chips */ +#if defined(CONFIG_E500MC) +#define CONFIG_SYS_NUM_TLBCAMS 64 +#elif defined(CONFIG_E500) +#define CONFIG_SYS_NUM_TLBCAMS 16 +#endif + /* Relocation to SDRAM works on all PPC boards */ #define CONFIG_RELOC_FIXUP_WORKS diff --git a/include/asm-ppc/global_data.h b/include/asm-ppc/global_data.h index 55e7e2066..3f1191874 100644 --- a/include/asm-ppc/global_data.h +++ b/include/asm-ppc/global_data.h @@ -107,6 +107,9 @@ typedef struct global_data { #if defined(CONFIG_FSL_LAW) u32 used_laws; #endif +#if defined(CONFIG_E500) + u32 used_tlb_cams[(CONFIG_SYS_NUM_TLBCAMS+31)/32]; +#endif #if defined(CONFIG_MPC5xxx) unsigned long ipb_clk; unsigned long pci_clk; diff --git a/include/asm-ppc/mmu.h b/include/asm-ppc/mmu.h index ec22a5058..fd1024947 100644 --- a/include/asm-ppc/mmu.h +++ b/include/asm-ppc/mmu.h @@ -479,6 +479,8 @@ extern void disable_tlb(u8 esel); extern void invalidate_tlb(u8 tlb); extern void init_tlbs(void); extern int find_tlb_idx(void *addr, u8 tlbsel); +extern void init_used_tlb_cams(void); +extern int find_free_tlbcam(void); extern unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg); -- cgit v1.2.3