1 // SPDX-License-Identifier: GPL-2.0+
24 	printf("Reg Valid Write-type   %-16s %-16s %-16s\n", "Base   ||",  in do_mtrr_list()
25 	       "Mask   ||", "Size   ||");  in do_mtrr_list()
28 		uint64_t base, mask, size;  in do_mtrr_list()  local
29 		bool valid;  in do_mtrr_list()  local
32 		mask = native_read_msr(MTRR_PHYS_MASK_MSR(i));  in do_mtrr_list()
33 		size = ~mask & ((1ULL << CONFIG_CPU_ADDR_BITS) - 1);  in do_mtrr_list()
34 		size |= (1 << 12) - 1;  in do_mtrr_list()
36 		valid = mask & MTRR_PHYS_MASK_VALID;  in do_mtrr_list()
38 		printf("%d   %-5s %-12s %016llx %016llx %016llx\n", i,  in do_mtrr_list()
39 		       valid ? "Y" : "N", type, base & ~MTRR_BASE_TYPE_MASK,  in do_mtrr_list()
40 		       mask & ~MTRR_PHYS_MASK_VALID, size);  in do_mtrr_list()
51 	uint64_t base, mask;  in do_mtrr_set()  local
52 	int i, type = -1;  in do_mtrr_set()
53 	bool valid;  in do_mtrr_set()  local
61 	if (type == -1) {  in do_mtrr_set()
69 	valid = native_read_msr(MTRR_PHYS_MASK_MSR(reg)) & MTRR_PHYS_MASK_VALID;  in do_mtrr_set()
70 	mask = ~((uint64_t)size - 1);  in do_mtrr_set()
71 	mask &= (1ULL << CONFIG_CPU_ADDR_BITS) - 1;  in do_mtrr_set()
72 	if (valid)  in do_mtrr_set()
73 		mask |= MTRR_PHYS_MASK_VALID;  in do_mtrr_set()
75 	printf("base=%llx, mask=%llx\n", base, mask);  in do_mtrr_set()
78 	wrmsrl(MTRR_PHYS_MASK_MSR(reg), mask);  in do_mtrr_set()
84 static int mtrr_set_valid(int reg, bool valid)  in mtrr_set_valid()  argument
87 	uint64_t mask;  in mtrr_set_valid()  local
90 	mask = native_read_msr(MTRR_PHYS_MASK_MSR(reg));  in mtrr_set_valid()
91 	if (valid)  in mtrr_set_valid()
92 		mask |= MTRR_PHYS_MASK_VALID;  in mtrr_set_valid()
94 		mask &= ~MTRR_PHYS_MASK_VALID;  in mtrr_set_valid()
95 	wrmsrl(MTRR_PHYS_MASK_MSR(reg), mask);  in mtrr_set_valid()
109 	argc -= 2;  in do_mtrr()
123 		return do_mtrr_set(reg, argc - 1, argv + 1);  in do_mtrr()
132 	"Use x86 memory type range registers (32-bit only)",
133 	"[list]        - list current registers\n"
134 	"set <reg> <type> <start> <size>   - set a register\n"
136 	"disable <reg>      - disable a register\n"
137 	"ensable <reg>      - enable a register"