mirror of
https://github.com/AsahiLinux/u-boot
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4fb2536e5b
Move MTRR-listing code into a common file so it can be used from SPL. Update the 'mtrr' command to call it. Use this in SPL just before adjusting the MTRRs, so we can see the state set up by the board. Only show it when debug is enabled. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
140 lines
3 KiB
C
140 lines
3 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 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 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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type = mtrr_get_type_by_name(typename);
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if (type < 0) {
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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 = hextoul(argv[1], NULL);
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size = hextoul(argv[2], NULL);
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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 = hextoul(argv[1], NULL);
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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 = mtrr_list(reg_count, i);
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if (ret) {
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printf("Failed to read CPU %s (err=%d)\n",
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i < MP_SELECT_ALL ? simple_itoa(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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