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arm: caches: add DCACHE_DEFAULT_OPTION

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Add the new flags DCACHE_DEFAULT_OPTION to define the default
option to use according the compilation flags
CONFIG_SYS_ARM_CACHE_*.

This new compilation flag allows to simplify dram_bank_mmu_setup()
and can be used as third parameter (option=dcache option to select)
of mmu_set_region_dcache_behaviour function.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2020-04-24 20:20:16 +02:00 committed by Tom Rini
parent c8ec1e3ff5
commit 2e8d68e241
2 changed files with 10 additions and 9 deletions
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8
arch/arm/include/asm/system.h
View File

@ -485,6 +485,14 @@ enum dcache_option {
}; };
#endif #endif
#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
#define DCACHE_DEFAULT_OPTION DCACHE_WRITETHROUGH
#elif defined(CONFIG_SYS_ARM_CACHE_WRITEALLOC)
#define DCACHE_DEFAULT_OPTION DCACHE_WRITEALLOC
#elif defined(CONFIG_SYS_ARM_CACHE_WRITEBACK)
#define DCACHE_DEFAULT_OPTION DCACHE_WRITEBACK
#endif
/* Size of an MMU section */ /* Size of an MMU section */
enum { enum {
#ifdef CONFIG_ARMV7_LPAE #ifdef CONFIG_ARMV7_LPAE

11
arch/arm/lib/cache-cp15.c
View File

@ -99,15 +99,8 @@ __weak void dram_bank_mmu_setup(int bank)
for (i = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT; for (i = bd->bi_dram[bank].start >> MMU_SECTION_SHIFT;
i < (bd->bi_dram[bank].start >> MMU_SECTION_SHIFT) + i < (bd->bi_dram[bank].start >> MMU_SECTION_SHIFT) +
(bd->bi_dram[bank].size >> MMU_SECTION_SHIFT); (bd->bi_dram[bank].size >> MMU_SECTION_SHIFT);
i++) { i++)
#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH) set_section_dcache(i, DCACHE_DEFAULT_OPTION);
set_section_dcache(i, DCACHE_WRITETHROUGH);
#elif defined(CONFIG_SYS_ARM_CACHE_WRITEALLOC)
set_section_dcache(i, DCACHE_WRITEALLOC);
#else
set_section_dcache(i, DCACHE_WRITEBACK);
#endif
}
} }
/* to activate the MMU we need to set up virtual memory: use 1M areas */ /* to activate the MMU we need to set up virtual memory: use 1M areas */