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| author | Genevieve Chan <genevieve.chan@starfivetech.com> | 2023-05-18 11:28:45 +0300 |
|---|---|---|
| committer | Genevieve Chan <genevieve.chan@starfivetech.com> | 2023-05-18 11:29:03 +0300 |
| commit | 6aeb74b1711c9b1e57520b6d609ad1e86dff521d (patch) | |
| tree | 3e5bbe8e34deb756e4a4e9faec11fe3a9450b8bb | |
| parent | df3de2f059c8c7edd1ba48ea43e6d8b93553a58a (diff) | |
| download | opensbi-6aeb74b1711c9b1e57520b6d609ad1e86dff521d.tar.xz | |
platform: generic: starfive: Remove CFLUSH.L2 in __sbi_dubhe_L2_inv_range
CFLUSH.L2 does not checks for dirty bits before performing flush. Instead,
CFLUSH.L2 will always flush once the instruction is called. Remove CFLUSH.L2
from this function to prevent the new data in DDR to be overwritten
with old data from L2 cache.
Signed-off-by: Genevieve Chan <genevieve.chan@starfivetech.com>
| -rwxr-xr-x | platform/generic/starfive/dubhe_cache.S | 28 |
1 files changed, 5 insertions, 23 deletions
diff --git a/platform/generic/starfive/dubhe_cache.S b/platform/generic/starfive/dubhe_cache.S index d0b3f94..9ab8895 100755 --- a/platform/generic/starfive/dubhe_cache.S +++ b/platform/generic/starfive/dubhe_cache.S @@ -21,38 +21,20 @@ .align 3 .global __sbi_dubhe_L2_inv_range __sbi_dubhe_L2_inv_range: - beqz a1, 4f + beqz a1, 2f li t0, DUBHE_L2_CACHELINE_SIZE addi t1, t0, -1 add a1, a1, a0 /* Compute end address */ - and t2, a0, t1 - not t3, t1 - and a0, a0, t3 - beqz t2, 1f - /* CFLUSH.L2 rs1 = a0 */ - fence rw, rw - .insn i 0x73, 0, x0, a0, -0x3C - fence rw, rw - add a0, a0, t0 + not t2, t1 + and a0, a0, t2 1: - and t2, a1, t1 - not t3, t1 - and a1, a1, t3 - beqz t2, 2f - /* CFLUSH.L2 rs1 = a1 */ - fence rw, rw - .insn i 0x73, 0, x0, a1, -0x3C - fence rw, rw -2: - bge a0, a1, 4f -3: /* CDISCARD.L2 rs1 = a0 */ fence rw, rw .insn i 0x73, 0, x0, a0, -0x3A fence rw, rw add a0, a0, t0 - blt a0, a1, 3b -4: + blt a0, a1, 1b +2: ret /* |