| Message ID | 20200424201957.v2.1.I64599059b66bacb531db38c67273754a145dbad8@changeid |
|---|---|
| State | Accepted |
| Commit | c8ec1e3ff505a6ce44ec36e77d0579f5d01ed6b8 |
| Headers | show |
| Series | arm: caches: allow to activate dcache in SPL and in U-Boot pre-reloc | expand |
On Fri, Apr 24, 2020 at 08:20:15PM +0200, Patrick Delaunay wrote: > Add protection in dram_bank_mmu_setup() to avoid access to bd->bi_dram > before relocation. > > This patch allow to use the generic weak function dram_bank_mmu_setup > to activate the MMU and the data cache in SPL or in U-Boot before > relocation, when bd->bi_dram is not yet initialized. > > In this cases, the MMU must be initialized explicitly with > mmu_set_region_dcache_behaviour function. > > Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com> Applied to u-boot/master, thanks!
diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c index f8d20960da..54509f11c3 100644 --- a/arch/arm/lib/cache-cp15.c +++ b/arch/arm/lib/cache-cp15.c @@ -91,6 +91,10 @@ __weak void dram_bank_mmu_setup(int bank) bd_t *bd = gd->bd; int i; + /* bd->bi_dram is available only after relocation */ + if ((gd->flags & GD_FLG_RELOC) == 0) + return; + debug("%s: bank: %d\n", __func__, bank); for (i = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT; i < (bd->bi_dram[bank].start >> MMU_SECTION_SHIFT) +
Add protection in dram_bank_mmu_setup() to avoid access to bd->bi_dram before relocation. This patch allow to use the generic weak function dram_bank_mmu_setup to activate the MMU and the data cache in SPL or in U-Boot before relocation, when bd->bi_dram is not yet initialized. In this cases, the MMU must be initialized explicitly with mmu_set_region_dcache_behaviour function. Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com> --- Changes in v2: None arch/arm/lib/cache-cp15.c | 4 ++++ 1 file changed, 4 insertions(+)