[PATCH v3 36/43] x86: Show the number of physical address bits
Simon Glass
sjg at chromium.org
Fri May 5 00:58:22 CEST 2023
Add this information to global_data and show it with the 'bdinfo' command.
For now we use CONFIG_CPU_ADDR_BITS to control the number of bits, but
this could change if needed.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
(no changes since v2)
Changes in v2:
- Add new patch to show the number of physical address bits
arch/x86/cpu/i386/cpu.c | 2 ++
arch/x86/include/asm/global_data.h | 1 +
arch/x86/lib/bdinfo.c | 1 +
3 files changed, 4 insertions(+)
diff --git a/arch/x86/cpu/i386/cpu.c b/arch/x86/cpu/i386/cpu.c
index 91cd5d7c9e4..5c17d279092 100644
--- a/arch/x86/cpu/i386/cpu.c
+++ b/arch/x86/cpu/i386/cpu.c
@@ -468,6 +468,7 @@ int x86_cpu_init_f(void)
if (ll_boot_init())
setup_cpu_features();
setup_identity();
+ gd->arch.phys_bits = cpu_phys_address_size();
setup_mtrr();
setup_pci_ram_top();
@@ -483,6 +484,7 @@ int x86_cpu_reinit_f(void)
long addr;
setup_identity();
+ gd->arch.phys_bits = cpu_phys_address_size();
setup_pci_ram_top();
addr = locate_coreboot_table();
if (addr >= 0) {
diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h
index ea58259ad77..5b802f79d50 100644
--- a/arch/x86/include/asm/global_data.h
+++ b/arch/x86/include/asm/global_data.h
@@ -127,6 +127,7 @@ struct arch_global_data {
ulong table_end; /* End address of x86 tables */
ulong table_start_high; /* Start address of high x86 tables */
ulong table_end_high; /* End address of high x86 tables */
+ uint phys_bits; /* Number of physical address bits */
};
#endif
diff --git a/arch/x86/lib/bdinfo.c b/arch/x86/lib/bdinfo.c
index 9504e7fc293..c5fda22679a 100644
--- a/arch/x86/lib/bdinfo.c
+++ b/arch/x86/lib/bdinfo.c
@@ -27,6 +27,7 @@ void arch_print_bdinfo(void)
bdinfo_print_num_l("table end", gd->arch.table_end);
bdinfo_print_num_l(" high start", gd->arch.table_start_high);
bdinfo_print_num_l(" high end", gd->arch.table_end_high);
+ bdinfo_print_num_l("phys bits", gd->arch.phys_bits);
if (IS_ENABLED(CONFIG_EFI_STUB))
efi_show_bdinfo();
--
2.40.1.521.gf1e218fcd8-goog
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