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Differential D39814 Diff 122286 sys/riscv/riscv/identcpu.c

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sys/riscv/riscv/identcpu.c

Show First 20 Lines • Show All 59 Lines • ▼ Show 20 Lines
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD | CTLFLAG_CAPRD, machine, 0, SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD | CTLFLAG_CAPRD, machine, 0,
"Machine class"); "Machine class");
/* Hardware implementation info. These values may be empty. */ /* Hardware implementation info. These values may be empty. */
register_t mvendorid; /* The CPU's JEDEC vendor ID */ register_t mvendorid; /* The CPU's JEDEC vendor ID */
register_t marchid; /* The architecture ID */ register_t marchid; /* The architecture ID */
register_t mimpid; /* The implementation ID */ register_t mimpid; /* The implementation ID */
u_int mmu_caps;
struct cpu_desc { struct cpu_desc {
const char *cpu_mvendor_name; const char *cpu_mvendor_name;
const char *cpu_march_name; const char *cpu_march_name;
u_int isa_extensions; /* Single-letter extensions. */ u_int isa_extensions; /* Single-letter extensions. */
u_int mmu_caps;
}; };
struct cpu_desc cpu_desc[MAXCPU]; struct cpu_desc cpu_desc[MAXCPU];
/* /*
* Micro-architecture tables. * Micro-architecture tables.
*/ */
struct marchid_entry { struct marchid_entry {
▲ Show 20 Lines • Show All 185 Lines • ▼ Show 20 Lines while (i < len) {
i = parse_ext_version(isa, i, NULL, NULL); i = parse_ext_version(isa, i, NULL, NULL);
} }
return (0); return (0);
} }
#ifdef FDT #ifdef FDT
static void static void
parse_mmu_fdt(struct cpu_desc *desc, phandle_t node)
{
char mmu[16];
desc->mmu_caps |= MMU_SV39;
if (OF_getprop(node, "mmu-type", mmu, sizeof(mmu)) > 0) {
if (strcmp(mmu, "riscv,sv48") == 0)
desc->mmu_caps |= MMU_SV48;
else if (strcmp(mmu, "riscv,sv57") == 0)
desc->mmu_caps |= MMU_SV48 | MMU_SV57;
}
}
static void
identify_cpu_features_fdt(u_int cpu, struct cpu_desc *desc) identify_cpu_features_fdt(u_int cpu, struct cpu_desc *desc)
{ {
char isa[1024]; char isa[1024];
phandle_t node; phandle_t node;
ssize_t len; ssize_t len;
pcell_t reg; pcell_t reg;
u_int hart; u_int hart;
Show All 31 Lines for (node = OF_child(node); node > 0; node = OF_peer(node)) {
* The string is specified to be lowercase, but let's be * The string is specified to be lowercase, but let's be
* certain. * certain.
*/ */
for (int i = 0; i < len; i++) for (int i = 0; i < len; i++)
isa[i] = tolower(isa[i]); isa[i] = tolower(isa[i]);
if (parse_riscv_isa(desc, isa, len) != 0) if (parse_riscv_isa(desc, isa, len) != 0)
return; return;
/* Check MMU features. */
parse_mmu_fdt(desc, node);
/* We are done. */ /* We are done. */
break; break;
} }
if (node <= 0) { if (node <= 0) {
printf("%s: could not find FDT node for CPU %u, hart %u\n", printf("%s: could not find FDT node for CPU %u, hart %u\n",
__func__, cpu, hart); __func__, cpu, hart);
} }
} }
Show All 23 Lines do { \
} else { \ } else { \
(t) &= (v); \ (t) &= (v); \
} \ } \
} while (0) } while (0)
/* Update the capabilities exposed to userspace via AT_HWCAP. */ /* Update the capabilities exposed to userspace via AT_HWCAP. */
UPDATE_CAP(elf_hwcap, (u_long)desc->isa_extensions); UPDATE_CAP(elf_hwcap, (u_long)desc->isa_extensions);
/*
* MMU capabilities, e.g. Sv48.
*/
UPDATE_CAP(mmu_caps, desc->mmu_caps);
#undef UPDATE_CAP #undef UPDATE_CAP
} }
static void static void
identify_cpu_ids(struct cpu_desc *desc) identify_cpu_ids(struct cpu_desc *desc)
{ {
const struct marchid_entry *table = NULL; const struct marchid_entry *table = NULL;
int i; int i;
▲ Show 20 Lines • Show All 57 Lines • ▼ Show 20 Linesprintcpuinfo(u_int cpu)
/* Print details for boot CPU or if we want verbose output */ /* Print details for boot CPU or if we want verbose output */
if (cpu == 0 || bootverbose) { if (cpu == 0 || bootverbose) {
/* Summary line. */ /* Summary line. */
printf("CPU %-3u: Vendor=%s Core=%s (Hart %u)\n", cpu, printf("CPU %-3u: Vendor=%s Core=%s (Hart %u)\n", cpu,
desc->cpu_mvendor_name, desc->cpu_march_name, hart); desc->cpu_mvendor_name, desc->cpu_march_name, hart);
printf(" marchid=%#lx, mimpid=%#lx\n", marchid, mimpid); printf(" marchid=%#lx, mimpid=%#lx\n", marchid, mimpid);
printf(" MMU: %#b\n", desc->mmu_caps,
"\020"
"\01Sv39"
"\02Sv48"
"\03Sv57");
printf(" ISA: %#b\n", desc->isa_extensions, printf(" ISA: %#b\n", desc->isa_extensions,
"\020" "\020"
"\01Atomic" "\01Atomic"
"\03Compressed" "\03Compressed"
"\04Double" "\04Double"
"\06Float" "\06Float"
"\15Mult/Div"); "\15Mult/Div");
} }
} }