From 460936567f2ebd62f78dbb18e4bacab03ec5b056 Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Mon, 30 May 2022 18:56:39 +0200 Subject: Revert "cpu/x86/mtrr: Make useful MTRR functions available for all boot stages" This code is only meant to be used in early stages so move it back to earlymtrr.c. This reverts commit 3ad00d0c89c9e7a8e9ef13b6dc65bb338a191ec8. Change-Id: I9bc1ac4b863eb43d3e398e6462ee139a7751bf62 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/c/coreboot/+/64804 Reviewed-by: Subrata Banik Reviewed-by: Lean Sheng Tan Tested-by: build bot (Jenkins) --- src/cpu/x86/mtrr/mtrrlib.c | 65 ---------------------------------------------- 1 file changed, 65 deletions(-) delete mode 100644 src/cpu/x86/mtrr/mtrrlib.c (limited to 'src/cpu/x86/mtrr/mtrrlib.c') diff --git a/src/cpu/x86/mtrr/mtrrlib.c b/src/cpu/x86/mtrr/mtrrlib.c deleted file mode 100644 index 71921de9e3..0000000000 --- a/src/cpu/x86/mtrr/mtrrlib.c +++ /dev/null @@ -1,65 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ - -#include -#include -#include -#include - -/* Get first available variable MTRR. - * Returns var# if available, else returns -1. - */ -int get_free_var_mtrr(void) -{ - msr_t maskm; - int vcnt; - int i; - - vcnt = get_var_mtrr_count(); - - /* Identify the first var mtrr which is not valid. */ - for (i = 0; i < vcnt; i++) { - maskm = rdmsr(MTRR_PHYS_MASK(i)); - if ((maskm.lo & MTRR_PHYS_MASK_VALID) == 0) - return i; - } - - /* No free var mtrr. */ - return -1; -} - -void set_var_mtrr( - unsigned int reg, unsigned int base, unsigned int size, unsigned int type) -{ - /* Bit 32-35 of MTRRphysMask should be set to 1 */ - /* FIXME: It only support 4G less range */ - msr_t basem, maskm; - - if (!IS_POWER_OF_2(size)) - printk(BIOS_ERR, "MTRR Error: size %#x is not a power of two\n", size); - if (size < 4 * KiB) - printk(BIOS_ERR, "MTRR Error: size %#x smaller than 4KiB\n", size); - if (base % size != 0) - printk(BIOS_ERR, "MTRR Error: base %#x must be aligned to size %#x\n", base, - size); - - basem.lo = base | type; - basem.hi = 0; - wrmsr(MTRR_PHYS_BASE(reg), basem); - maskm.lo = ~(size - 1) | MTRR_PHYS_MASK_VALID; - maskm.hi = (1 << (cpu_phys_address_size() - 32)) - 1; - wrmsr(MTRR_PHYS_MASK(reg), maskm); -} - -void clear_all_var_mtrr(void) -{ - msr_t mtrr = {0, 0}; - int vcnt; - int i; - - vcnt = get_var_mtrr_count(); - - for (i = 0; i < vcnt; i++) { - wrmsr(MTRR_PHYS_MASK(i), mtrr); - wrmsr(MTRR_PHYS_BASE(i), mtrr); - } -} -- cgit v1.2.3