Commit a44ef517 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Will Deacon
Browse files

arm64: remove processor_id

The global processor_id is assigned the MIDR_EL1 value of the boot
CPU in the early init code, but is never referenced afterwards.

As the relevance of the MIDR_EL1 value of the boot CPU is debatable
anyway, especially under big.LITTLE, let's remove it before anyone
starts using it.

Tested-by: default avatarMark Rutland <>
Reviewed-by: default avatarMark Rutland <>
Reviewed-by: default avatarCatalin Marinas <>
Signed-off-by: default avatarArd Biesheuvel <>
Signed-off-by: default avatarWill Deacon <>
parent b784a5d9
......@@ -244,7 +244,6 @@ ENTRY(stext)
bl el2_setup // Drop to EL1, w20=cpu_boot_mode
bl __calc_phys_offset // x24=PHYS_OFFSET, x28=PHYS_OFFSET-PAGE_OFFSET
bl set_cpu_boot_mode_flag
mrs x22, midr_el1 // x22=cpuid
bl __vet_fdt
bl __create_page_tables // x25=TTBR0, x26=TTBR1
......@@ -427,7 +426,6 @@ __switch_data:
.quad __mmap_switched
.quad __bss_start // x6
.quad __bss_stop // x7
.quad processor_id // x4
.quad __fdt_pointer // x5
.quad memstart_addr // x6
.quad init_thread_union + THREAD_START_SP // sp
......@@ -445,11 +443,10 @@ __mmap_switched:
str xzr, [x6], #8 // Clear BSS
b 1b
ldp x4, x5, [x3], #16
ldr x5, [x3], #8
ldr x6, [x3], #8
ldr x16, [x3]
mov sp, x16
str x22, [x4] // Save processor ID
str x21, [x5] // Save FDT pointer
str x24, [x6] // Save PHYS_OFFSET
mov x29, #0
......@@ -621,8 +618,6 @@ ENTRY(secondary_startup)
* Common entry point for secondary CPUs.
mrs x22, midr_el1 // x22=cpuid
pgtbl x25, x26, x28 // x25=TTBR0, x26=TTBR1
bl __cpu_setup // initialise processor
......@@ -63,9 +63,6 @@
#include <asm/efi.h>
#include <asm/virt.h>
unsigned int processor_id;
unsigned long elf_hwcap __read_mostly;
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