diff options
| author | Tim Hutt <timothy.hutt@codasip.com> | 2024-02-02 11:56:55 +0000 |
|---|---|---|
| committer | Bill McSpadden <bill@riscv.org> | 2024-02-05 11:22:09 -0600 |
| commit | 4de2bff12d967d91dd064e4a49e25ca4785f25e3 (patch) | |
| tree | b106b03932811b9f35c4ac025a89c6f47862dc8f /c_emulator/riscv_sim.c | |
| parent | d5e89a71e3a84495c1b88a7749c25fd6b9da684b (diff) | |
| download | sail-riscv-4de2bff12d967d91dd064e4a49e25ca4785f25e3.zip sail-riscv-4de2bff12d967d91dd064e4a49e25ca4785f25e3.tar.gz sail-riscv-4de2bff12d967d91dd064e4a49e25ca4785f25e3.tar.bz2 | |
Improve PMP support
This implements a lot of missing functionality for PMPs.
* Support 64 PMPs as well as 0 and 16.
* Support setting PMP grain
* Return correct address bits on read (some read as 0 or 1 depending on the grain and match type)
* Unlock PMPs on reset
* Implement pmpcfg WARL legalisation
Co-authored-by: Ben Fletcher <benjamin.fletcher@codasip.com>
Diffstat (limited to 'c_emulator/riscv_sim.c')
| -rw-r--r-- | c_emulator/riscv_sim.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/c_emulator/riscv_sim.c b/c_emulator/riscv_sim.c index 13d1653..f3c6343 100644 --- a/c_emulator/riscv_sim.c +++ b/c_emulator/riscv_sim.c @@ -51,6 +51,8 @@ const char *RV32ISA = "RV32IMAC"; #define OPT_TRACE_OUTPUT 1000 #define OPT_ENABLE_WRITABLE_FIOM 1001 +#define OPT_PMP_COUNT 1002 +#define OPT_PMP_GRAIN 1003 static bool do_dump_dts = false; static bool do_show_times = false; @@ -119,7 +121,8 @@ char *sailcov_file = NULL; static struct option options[] = { {"enable-dirty-update", no_argument, 0, 'd' }, {"enable-misaligned", no_argument, 0, 'm' }, - {"enable-pmp", no_argument, 0, 'P' }, + {"pmp-count", required_argument, 0, OPT_PMP_COUNT }, + {"pmp-grain", required_argument, 0, OPT_PMP_GRAIN }, {"enable-next", no_argument, 0, 'N' }, {"ram-size", required_argument, 0, 'z' }, {"disable-compressed", no_argument, 0, 'C' }, @@ -236,6 +239,8 @@ static int process_args(int argc, char **argv) { int c; uint64_t ram_size = 0; + uint64_t pmp_count = 0; + uint64_t pmp_grain = 0; while (true) { c = getopt_long(argc, argv, "a" @@ -281,9 +286,23 @@ static int process_args(int argc, char **argv) fprintf(stderr, "enabling misaligned access.\n"); rv_enable_misaligned = true; break; - case 'P': - fprintf(stderr, "enabling PMP support.\n"); - rv_enable_pmp = true; + case OPT_PMP_COUNT: + pmp_count = atol(optarg); + fprintf(stderr, "PMP count: %lld\n", pmp_count); + if (pmp_count != 0 && pmp_count != 16 && pmp_count != 64) { + fprintf(stderr, "invalid PMP count: must be 0, 16 or 64"); + exit(1); + } + rv_pmp_count = pmp_count; + break; + case OPT_PMP_GRAIN: + pmp_grain = atol(optarg); + fprintf(stderr, "PMP grain: %lld\n", pmp_grain); + if (pmp_grain >= 64) { + fprintf(stderr, "invalid PMP grain: must less than 64"); + exit(1); + } + rv_pmp_grain = pmp_grain; break; case 'C': fprintf(stderr, "disabling RVC compressed instructions.\n"); |