diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-12 16:36:14 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-12 16:36:14 +0800 |
| commit | b61a40afca164a9bd066f749beff3bf209c5e209 (patch) | |
| tree | 414693038d707d37b34edfee4f4ece650275996a /arch/loongarch/pci/pci.c | |
| parent | a2a84e36331af3b000ad12b552c5485b8282b366 (diff) | |
LoongArch: Refactor cache probe and flush methods
Current cache probe and flush methods have some drawbacks:
1, Assume there are 3 cache levels and only 3 levels;
2, Assume L1 = I + D, L2 = V, L3 = S, V is exclusive, S is inclusive.
However, the fact is I + D, I + D + V, I + D + S and I + D + V + S are
all valid. So, refactor the cache probe and flush methods to adapt more
types of cache hierarchy.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/pci/pci.c')
| -rw-r--r-- | arch/loongarch/pci/pci.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/loongarch/pci/pci.c b/arch/loongarch/pci/pci.c index e9b7c34d9b6d..2726639150bc 100644 --- a/arch/loongarch/pci/pci.c +++ b/arch/loongarch/pci/pci.c @@ -9,6 +9,7 @@ #include <linux/types.h> #include <linux/pci.h> #include <linux/vgaarb.h> +#include <asm/cacheflush.h> #include <asm/loongson.h> #define PCI_DEVICE_ID_LOONGSON_HOST 0x7a00 @@ -45,12 +46,10 @@ static int __init pcibios_init(void) unsigned int lsize; /* - * Set PCI cacheline size to that of the highest level in the + * Set PCI cacheline size to that of the last level in the * cache hierarchy. */ - lsize = cpu_dcache_line_size(); - lsize = cpu_vcache_line_size() ? : lsize; - lsize = cpu_scache_line_size() ? : lsize; + lsize = cpu_last_level_cache_line_size(); BUG_ON(!lsize); |