20 lines
579 B
C
20 lines
579 B
C
--- lib/sbi/sbi_hart.c.orig 2025-06-30 03:07:30 UTC
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+++ lib/sbi/sbi_hart.c
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@@ -567,6 +567,16 @@ int sbi_hart_pmp_configure(struct sbi_scratch *scratch
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if (!pmp_count)
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return 0;
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+ /*
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+ * Disable the PMP for the sifive/fu540 platform, required to work
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+ * around a hardware errata.
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+ */
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+ extern int need_pmp_war;
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+ if (need_pmp_war) {
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+ pmp_set(0, PMP_R | PMP_W | PMP_X, -1, __riscv_xlen);
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+ return 0;
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+ }
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+
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pmp_log2gran = sbi_hart_pmp_log2gran(scratch);
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pmp_bits = sbi_hart_pmp_addrbits(scratch) - 1;
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pmp_addr_max = (1UL << pmp_bits) | ((1UL << pmp_bits) - 1);
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