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cd45ca02e4
This change adds a patch to disable the PMP for the sifive/fu540 target, which is a workaround to a PMP errata in the chip. The OpenSBI update itself is quite minor. Bump the dependent port, sysutils/u-boot-sifive-fu540. Reviewed by: lwhsu, kp Approved by: lwhsu (ports) Tested by: Klaus Küchemann (maciphone2@googlemail.com) Differential Revision: https://reviews.freebsd.org/D28471
19 lines
596 B
C
19 lines
596 B
C
--- lib/sbi/sbi_hart.c.orig 2021-01-30 20:30:32 UTC
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+++ lib/sbi/sbi_hart.c
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@@ -188,6 +188,16 @@ 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_gran_log2 = log2roundup(sbi_hart_pmp_granularity(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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