diff options
| author | Kumar Gala <galak@kernel.crashing.org> | 2009-09-11 11:27:00 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-09-15 21:30:08 -0500 |
| commit | d30f9043539d372cf66406bc2f21bb8c20e67009 (patch) | |
| tree | 26e9fb3b3e4225618395e39f49a378d35f9f409b | |
| parent | 0ead6f2ed7cf4e1f70dab5b529ad121e38359485 (diff) | |
ppc/85xx: Introduce low level write_tlb function
Factor out the code we use to actually write a tlb entry.
set_tlb is a logical view of the TLB while write_tlb is a low level
matching the MAS registers.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | cpu/mpc85xx/start.S | 24 | ||||
| -rw-r--r-- | cpu/mpc85xx/tlb.c | 16 | ||||
| -rw-r--r-- | include/asm-ppc/mmu.h | 4 |
3 files changed, 30 insertions, 14 deletions
diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S index 7a23b4f811..eeee7a9764 100644 --- a/cpu/mpc85xx/start.S +++ b/cpu/mpc85xx/start.S @@ -1,5 +1,5 @@ /* - * Copyright 2004, 2007 Freescale Semiconductor. + * Copyright 2004, 2007-2009 Freescale Semiconductor. * Copyright (C) 2003 Motorola,Inc. * * See file CREDITS for list of people who contributed to this @@ -821,6 +821,28 @@ in32r: /*------------------------------------------------------------------------------*/ /* + * void write_tlb(mas0, mas1, mas2, mas3, mas7) + */ + .globl write_tlb +write_tlb: + mtspr MAS0,r3 + mtspr MAS1,r4 + mtspr MAS2,r5 + mtspr MAS3,r6 +#ifdef CONFIG_ENABLE_36BIT_PHYS + mtspr MAS7,r7 +#endif + li r3,0 +#ifdef CONFIG_SYS_BOOK3E_HV + mtspr MAS8,r3 +#endif + isync + tlbwe + msync + isync + blr + +/* * void relocate_code (addr_sp, gd, addr_moni) * * This "function" does not return, instead it continues in RAM diff --git a/cpu/mpc85xx/tlb.c b/cpu/mpc85xx/tlb.c index 03c2449b5c..d39712a513 100644 --- a/cpu/mpc85xx/tlb.c +++ b/cpu/mpc85xx/tlb.c @@ -1,5 +1,5 @@ /* - * Copyright 2008 Freescale Semiconductor, Inc. + * Copyright 2008-2009 Freescale Semiconductor, Inc. * * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. @@ -42,19 +42,9 @@ void set_tlb(u8 tlb, u32 epn, u64 rpn, _mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize); _mas2 = FSL_BOOKE_MAS2(epn, wimge); _mas3 = FSL_BOOKE_MAS3(rpn, 0, perms); - _mas7 = rpn >> 32; + _mas7 = FSL_BOOKE_MAS7(rpn); - mtspr(MAS0, _mas0); - mtspr(MAS1, _mas1); - mtspr(MAS2, _mas2); - mtspr(MAS3, _mas3); -#ifdef CONFIG_ENABLE_36BIT_PHYS - mtspr(MAS7, _mas7); -#endif -#ifdef CONFIG_SYS_BOOK3E_HV - mtspr(MAS8, 0); -#endif - asm volatile("isync;msync;tlbwe;isync"); + write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7); #ifdef CONFIG_ADDR_MAP if ((tlb == 1) && (gd->flags & GD_FLG_RELOC)) diff --git a/include/asm-ppc/mmu.h b/include/asm-ppc/mmu.h index eda2959b7d..8f382fd6ff 100644 --- a/include/asm-ppc/mmu.h +++ b/include/asm-ppc/mmu.h @@ -450,6 +450,8 @@ extern void print_bats(void); (((epn) & MAS3_RPN) | (wimge)) #define FSL_BOOKE_MAS3(rpn, user, perms) \ (((rpn) & MAS3_RPN) | (user) | (perms)) +#define FSL_BOOKE_MAS7(rpn) \ + (((u64)(rpn)) >> 32) #define BOOKE_PAGESZ_1K 0 #define BOOKE_PAGESZ_4K 1 @@ -480,6 +482,8 @@ extern int find_tlb_idx(void *addr, u8 tlbsel); extern unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg); +extern void write_tlb(u32 _mas0, u32 _mas1, u32 _mas2, u32 _mas3, u32 _mas7); + #define SET_TLB_ENTRY(_tlb, _epn, _rpn, _perms, _wimge, _ts, _esel, _sz, _iprot) \ { .tlb = _tlb, .epn = _epn, .rpn = _rpn, .perms = _perms, \ .wimge = _wimge, .ts = _ts, .esel = _esel, .tsize = _sz, .iprot = _iprot } |