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At present the mtrr command only support 8 MTRRs. Some SoCs have more than that. Update the implementation to support up to 10. Read the number of MTRRs dynamically instead. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
191 lines
4.1 KiB
C
191 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014 Google, Inc
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*/
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#include <common.h>
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#include <command.h>
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#include <log.h>
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#include <asm/msr.h>
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#include <asm/mp.h>
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#include <asm/mtrr.h>
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static const char *const mtrr_type_name[MTRR_TYPE_COUNT] = {
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"Uncacheable",
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"Combine",
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"2",
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"3",
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"Through",
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"Protect",
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"Back",
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};
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static void read_mtrrs(void *arg)
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{
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struct mtrr_info *info = arg;
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mtrr_read_all(info);
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}
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static int do_mtrr_list(int reg_count, int cpu_select)
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{
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struct mtrr_info info;
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int ret;
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int i;
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printf("Reg Valid Write-type %-16s %-16s %-16s\n", "Base ||",
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"Mask ||", "Size ||");
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memset(&info, '\0', sizeof(info));
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ret = mp_run_on_cpus(cpu_select, read_mtrrs, &info);
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if (ret)
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return log_msg_ret("run", ret);
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for (i = 0; i < reg_count; i++) {
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const char *type = "Invalid";
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uint64_t base, mask, size;
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bool valid;
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base = info.mtrr[i].base;
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mask = info.mtrr[i].mask;
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size = ~mask & ((1ULL << CONFIG_CPU_ADDR_BITS) - 1);
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size |= (1 << 12) - 1;
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size += 1;
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valid = mask & MTRR_PHYS_MASK_VALID;
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type = mtrr_type_name[base & MTRR_BASE_TYPE_MASK];
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printf("%d %-5s %-12s %016llx %016llx %016llx\n", i,
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valid ? "Y" : "N", type, base & ~MTRR_BASE_TYPE_MASK,
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mask & ~MTRR_PHYS_MASK_VALID, size);
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}
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return 0;
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}
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static int do_mtrr_set(int cpu_select, uint reg, int argc, char *const argv[])
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{
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const char *typename = argv[0];
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uint32_t start, size;
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uint64_t base, mask;
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int i, type = -1;
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bool valid;
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int ret;
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if (argc < 3)
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return CMD_RET_USAGE;
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for (i = 0; i < MTRR_TYPE_COUNT; i++) {
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if (*typename == *mtrr_type_name[i])
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type = i;
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}
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if (type == -1) {
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printf("Invalid type name %s\n", typename);
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return CMD_RET_USAGE;
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}
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start = simple_strtoul(argv[1], NULL, 16);
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size = simple_strtoul(argv[2], NULL, 16);
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base = start | type;
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valid = native_read_msr(MTRR_PHYS_MASK_MSR(reg)) & MTRR_PHYS_MASK_VALID;
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mask = ~((uint64_t)size - 1);
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mask &= (1ULL << CONFIG_CPU_ADDR_BITS) - 1;
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if (valid)
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mask |= MTRR_PHYS_MASK_VALID;
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ret = mtrr_set(cpu_select, reg, base, mask);
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if (ret)
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return CMD_RET_FAILURE;
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return 0;
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}
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static int do_mtrr(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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int reg_count = mtrr_get_var_count();
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int cmd;
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int cpu_select;
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uint reg;
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int ret;
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cpu_select = MP_SELECT_BSP;
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if (argc >= 3 && !strcmp("-c", argv[1])) {
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const char *cpustr;
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cpustr = argv[2];
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if (*cpustr == 'a')
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cpu_select = MP_SELECT_ALL;
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else
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cpu_select = simple_strtol(cpustr, NULL, 16);
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argc -= 2;
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argv += 2;
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}
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argc--;
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argv++;
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cmd = argv[0] ? *argv[0] : 0;
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if (argc < 1 || !cmd) {
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cmd = 'l';
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reg = 0;
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}
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if (cmd != 'l') {
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if (argc < 2)
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return CMD_RET_USAGE;
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reg = simple_strtoul(argv[1], NULL, 16);
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if (reg >= reg_count) {
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printf("Invalid register number\n");
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return CMD_RET_USAGE;
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}
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}
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if (cmd == 'l') {
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bool first;
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int i;
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i = mp_first_cpu(cpu_select);
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if (i < 0) {
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printf("Invalid CPU (err=%d)\n", i);
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return CMD_RET_FAILURE;
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}
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first = true;
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for (; i >= 0; i = mp_next_cpu(cpu_select, i)) {
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if (!first)
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printf("\n");
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printf("CPU %d:\n", i);
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ret = do_mtrr_list(reg_count, i);
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if (ret) {
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printf("Failed to read CPU %d (err=%d)\n", i,
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ret);
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return CMD_RET_FAILURE;
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}
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first = false;
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}
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} else {
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switch (cmd) {
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case 'e':
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ret = mtrr_set_valid(cpu_select, reg, true);
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break;
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case 'd':
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ret = mtrr_set_valid(cpu_select, reg, false);
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break;
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case 's':
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ret = do_mtrr_set(cpu_select, reg, argc - 2, argv + 2);
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break;
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default:
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return CMD_RET_USAGE;
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}
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if (ret) {
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printf("Operation failed (err=%d)\n", ret);
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return CMD_RET_FAILURE;
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}
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}
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return 0;
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}
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U_BOOT_CMD(
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mtrr, 8, 1, do_mtrr,
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"Use x86 memory type range registers (32-bit only)",
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"[list] - list current registers\n"
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"set <reg> <type> <start> <size> - set a register\n"
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"\t<type> is Uncacheable, Combine, Through, Protect, Back\n"
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"disable <reg> - disable a register\n"
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"enable <reg> - enable a register\n"
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"\n"
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"Precede command with '-c <n>|all' to access a particular hex CPU, e.g.\n"
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" mtrr -c all list; mtrr -c 2e list"
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);
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