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platform: generic: andes: Add support for RV32 to set up PMA

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Like PMP, the behaviors to configure PMA will be different from
RV64 and RV32. RV64 uses two Andes custom CSRs, pmacfg0 and pmacfg2,
but RV32 uses four Andes custom CSRs, pmacfg0 ~ pmacfg3. This patch
adds support to PMA for RV32.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Ben Zong-You Xie
2024-05-31 13:21:08 +08:00
committed by Anup Patel
parent f09f16430a
commit 52dcf351cd
1 changed files with 8 additions and 1 deletions
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9
platform/generic/andes/andes_pma.c
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@@ -109,10 +109,17 @@ static unsigned long andes_pma_setup(const struct andes_pma_region *pma_region,
!(pma_region->flags & ANDES_PMACFG_ETYP_NAPOT))
return SBI_EINVAL;
#if __riscv_xlen == 64
pma_cfg_addr = CSR_PMACFG0 + ((entry_id / 8) ? 2 : 0);
pmacfg_val = andes_pma_read_num(pma_cfg_addr);
pmaxcfg = (char *)&pmacfg_val + (entry_id % 8);
*pmaxcfg = 0;
#elif __riscv_xlen == 32
pma_cfg_addr = CSR_PMACFG0 + (entry_id / 4);
pmacfg_val = andes_pma_read_num(pma_cfg_addr);
pmaxcfg = (char *)&pmacfg_val + (entry_id % 4);
#else
#error "Unexpected __riscv_xlen"
#endif
*pmaxcfg = pma_region->flags;
andes_pma_write_num(pma_cfg_addr, pmacfg_val);