mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
139 lines
3.1 KiB
C
139 lines
3.1 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 <asm/msr.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 int do_mtrr_list(void)
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{
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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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for (i = 0; i < MTRR_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 = native_read_msr(MTRR_PHYS_BASE_MSR(i));
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mask = native_read_msr(MTRR_PHYS_MASK_MSR(i));
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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(uint reg, int argc, char * const argv[])
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{
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const char *typename = argv[0];
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struct mtrr_state state;
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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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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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printf("base=%llx, mask=%llx\n", base, mask);
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mtrr_open(&state);
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wrmsrl(MTRR_PHYS_BASE_MSR(reg), base);
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wrmsrl(MTRR_PHYS_MASK_MSR(reg), mask);
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mtrr_close(&state);
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return 0;
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}
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static int mtrr_set_valid(int reg, bool valid)
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{
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struct mtrr_state state;
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uint64_t mask;
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mtrr_open(&state);
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mask = native_read_msr(MTRR_PHYS_MASK_MSR(reg));
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if (valid)
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mask |= MTRR_PHYS_MASK_VALID;
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else
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mask &= ~MTRR_PHYS_MASK_VALID;
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wrmsrl(MTRR_PHYS_MASK_MSR(reg), mask);
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mtrr_close(&state);
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return 0;
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}
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static int do_mtrr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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const char *cmd;
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uint reg;
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cmd = argv[1];
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if (argc < 2 || *cmd == 'l')
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return do_mtrr_list();
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argc -= 2;
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argv += 2;
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if (argc <= 0)
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return CMD_RET_USAGE;
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reg = simple_strtoul(argv[0], NULL, 16);
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if (reg >= MTRR_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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if (*cmd == 'e')
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return mtrr_set_valid(reg, true);
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else if (*cmd == 'd')
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return mtrr_set_valid(reg, false);
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else if (*cmd == 's')
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return do_mtrr_set(reg, argc - 1, argv + 1);
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else
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return CMD_RET_USAGE;
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return 0;
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}
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U_BOOT_CMD(
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mtrr, 6, 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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"ensable <reg> - enable a register"
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);
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