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platform: sifive: fu540: allow sv32 as an mmu-type

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There has already been a commit to master which added 32-bit specific
fdt/payload addresses for the sifive/fu540 platform [0]. This commit
introduces another change for using sifive/fu540 as a 32-bit platform.
On 32-bit platforms, cores with the SV32 MMU type should not be
disabled. For this reason, this commit also allows using this MMU type
on the sifive/fu540 platform.

Alternatively it would also be possible to only allow SV39 and SV48 if
`__riscv_xlen == 64` and SV32 if `__riscv_xlen == 32`. Removing the
check entirely would also be an option.

[0]: 66fb729a1e

Signed-off-by: Sören Tempel <tempel@uni-bremen.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Soeren Tempel
2020-03-08 10:35:32 +05:30
committed by Anup Patel
parent 82ae8e8fe2
commit e1a5b737ef
1 changed files with 2 additions and 1 deletions
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3
platform/sifive/fu540/platform.c
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@@ -75,7 +75,8 @@ static void fu540_modify_dt(void *fdt)
sbi_sprintf(cpu_node, "/cpus/cpu@%d", i);
cpu_offset = fdt_path_offset(fdt, cpu_node);
mmu_type = fdt_getprop(fdt, cpu_offset, "mmu-type", NULL);
if (mmu_type && (!strcmp(mmu_type, "riscv,sv39") ||
if (mmu_type && (!strcmp(mmu_type, "riscv,sv32") ||
!strcmp(mmu_type, "riscv,sv39") ||
!strcmp(mmu_type, "riscv,sv48")))
continue;
else