diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2021-10-28 10:13:39 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-11-03 09:03:35 +0000 |
| commit | 7e272024417ac33a57424b28b34926c0e7609c51 (patch) | |
| tree | ce570a5929768cf62b312bcaeb0c94206cbfecfc /src | |
| parent | 4c8c8442ab6d3b0cdc267f5c479dc5d54bf87525 (diff) | |
cpu/amd: Always fetch CPU addr bits at runtime
All supported AMD CPUs support getting the physical address size from cpuid so
there is no need for a Kconfig default value.
Change-Id: If6f9234e091f44a2a03012e7e14c380aefbe717e
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58686
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/amd/mtrr/amd_mtrr.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/src/cpu/amd/mtrr/amd_mtrr.c b/src/cpu/amd/mtrr/amd_mtrr.c index fc3212f1fc..8c703f57d5 100644 --- a/src/cpu/amd/mtrr/amd_mtrr.c +++ b/src/cpu/amd/mtrr/amd_mtrr.c @@ -4,6 +4,7 @@ #include <console/console.h> #include <device/device.h> #include <arch/cpu.h> +#include <cpu/cpu.h> #include <cpu/x86/mtrr.h> #include <cpu/x86/msr.h> #include <cpu/amd/mtrr.h> @@ -85,7 +86,6 @@ void add_uma_resource_below_tolm(struct device *nb, int idx) void amd_setup_mtrrs(void) { - unsigned long address_bits; unsigned long i; msr_t msr, sys_cfg; // Test if this CPU is a Fam 0Fh rev. F or later @@ -142,13 +142,6 @@ void amd_setup_mtrrs(void) enable_cache(); - //K8 could be 40, and GH could be 48 - address_bits = CONFIG_CPU_ADDR_BITS; - - /* AMD specific cpuid function to query number of address bits */ - if (cpuid_eax(0x80000000) >= 0x80000008) - address_bits = cpuid_eax(0x80000008) & 0xff; - /* Now that I have mapped what is memory and what is not * Set up the mtrrs so we can cache the memory. */ @@ -156,5 +149,5 @@ void amd_setup_mtrrs(void) // Rev. F K8 supports has SYSCFG_MSR_TOM2WB and doesn't need // variable MTRR to span memory above 4GB // Lower revisions K8 need variable MTRR over 4GB - x86_setup_var_mtrrs(address_bits, has_tom2wb ? 0 : 1); + x86_setup_var_mtrrs(cpu_phys_address_size(), has_tom2wb ? 0 : 1); } |