diff options
author | Becky Bruce <beckyb@kernel.crashing.org> | 2011-07-18 18:49:15 -0500 |
---|---|---|
committer | Kumar Gala <galak@kernel.crashing.org> | 2011-07-22 03:07:47 -0500 |
commit | 9cdfe2810693135773602e7c98b78a4af2873a61 (patch) | |
tree | 112b5b6bd65b4bffb669cd2f0264bae764728a18 /arch/powerpc/cpu | |
parent | ffadc441bc993ed60ea473d248a115136f24932d (diff) |
powerpc/mpc85xx: Add clear_ddr_tlbs function
This is useful when we just want to wipe out the TLBs. There's currently
a function that resets the ddr tlbs to a different value; it is changed to
utilize this function. The new function can be used in conjunction with
setup_ddr_tlbs() for a board to temporarily map/unmap the DDR address
range as needed.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu')
-rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu.c | 14 | ||||
-rw-r--r-- | arch/powerpc/cpu/mpc85xx/tlb.c | 29 |
2 files changed, 32 insertions, 11 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c index 53f08879181..ce59c2580a1 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu.c +++ b/arch/powerpc/cpu/mpc85xx/cpu.c @@ -374,6 +374,8 @@ void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn, unsigned int setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg); +void clear_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg); + static void dump_spd_ddr_reg(void) { int i, j, k, m; @@ -460,19 +462,9 @@ static int reset_tlb(phys_addr_t p_addr, u32 size, phys_addr_t *phys_offset) u32 vstart = CONFIG_SYS_DDR_SDRAM_BASE; unsigned long epn; u32 tsize, valid, ptr; - phys_addr_t rpn = 0; int ddr_esel; - ptr = vstart; - - while (ptr < (vstart + size)) { - ddr_esel = find_tlb_idx((void *)ptr, 1); - if (ddr_esel != -1) { - read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn); - disable_tlb(ddr_esel); - } - ptr += TSIZE_TO_BYTES(tsize); - } + clear_ddr_tlbs_phys(p_addr, size>>20); /* Setup new tlb to cover the physical address */ setup_ddr_tlbs_phys(p_addr, size>>20); diff --git a/arch/powerpc/cpu/mpc85xx/tlb.c b/arch/powerpc/cpu/mpc85xx/tlb.c index 295f175bba6..01a3561fa0e 100644 --- a/arch/powerpc/cpu/mpc85xx/tlb.c +++ b/arch/powerpc/cpu/mpc85xx/tlb.c @@ -300,4 +300,33 @@ unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg) return setup_ddr_tlbs_phys(CONFIG_SYS_DDR_SDRAM_BASE, memsize_in_meg); } + +/* Invalidate the DDR TLBs for the requested size */ +void clear_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg) +{ + u32 vstart = CONFIG_SYS_DDR_SDRAM_BASE; + unsigned long epn; + u32 tsize, valid, ptr; + phys_addr_t rpn = 0; + int ddr_esel; + u64 memsize = (u64)memsize_in_meg << 20; + + ptr = vstart; + + while (ptr < (vstart + memsize)) { + ddr_esel = find_tlb_idx((void *)ptr, 1); + if (ddr_esel != -1) { + read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn); + disable_tlb(ddr_esel); + } + ptr += TSIZE_TO_BYTES(tsize); + } +} + +void clear_ddr_tlbs(unsigned int memsize_in_meg) +{ + clear_ddr_tlbs_phys(CONFIG_SYS_DDR_SDRAM_BASE, memsize_in_meg); +} + + #endif /* !CONFIG_NAND_SPL */ |