diff options
Diffstat (limited to 'src/arch/arm64/spintable.c')
-rw-r--r-- | src/arch/arm64/spintable.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/src/arch/arm64/spintable.c b/src/arch/arm64/spintable.c deleted file mode 100644 index 83b2207cf2..0000000000 --- a/src/arch/arm64/spintable.c +++ /dev/null @@ -1,96 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2014 Google Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <arch/cache.h> -#include <arch/spintable.h> -#include <arch/transition.h> -#include <console/console.h> -#include <cpu/cpu.h> -#include <cbmem.h> -#include <string.h> - -static struct spintable_attributes spin_attrs; - -void spintable_init(void *monitor_address) -{ - extern void __wait_for_spin_table_request(void); - const size_t code_size = 4096; - - if (monitor_address == NULL) { - printk(BIOS_ERR, "spintable: NULL address to monitor.\n"); - return; - } - - spin_attrs.entry = cbmem_add(CBMEM_ID_SPINTABLE, code_size); - - if (spin_attrs.entry == NULL) - return; - - spin_attrs.addr = monitor_address; - - printk(BIOS_INFO, "spintable @ %p will monitor %p\n", - spin_attrs.entry, spin_attrs.addr); - - /* Ensure the memory location is zero'd out. */ - *(uint64_t *)monitor_address = 0; - - memcpy(spin_attrs.entry, __wait_for_spin_table_request, code_size); - - dcache_clean_invalidate_by_mva(monitor_address, sizeof(uint64_t)); - dcache_clean_invalidate_by_mva(spin_attrs.entry, code_size); -} - -static void spintable_enter(void *unused) -{ - struct exc_state state; - const struct spintable_attributes *attrs; - int current_el; - - attrs = spintable_get_attributes(); - - current_el = get_current_el(); - - if (current_el != EL3) - attrs->entry(attrs->addr); - - memset(&state, 0, sizeof(state)); - state.elx.spsr = get_eret_el(EL2, SPSR_USE_L); - - transition_with_entry(attrs->entry, attrs->addr, &state); -} - -const struct spintable_attributes *spintable_get_attributes(void) -{ - if (spin_attrs.entry == NULL) { - printk(BIOS_ERR, "spintable: monitor code not present.\n"); - return NULL; - } - - return &spin_attrs; -} - -void spintable_start(void) -{ - struct cpu_action action = { - .run = spintable_enter, - }; - - if (spintable_get_attributes() == NULL) - return; - - printk(BIOS_INFO, "All non-boot CPUs to enter spintable.\n"); - - arch_run_on_all_cpus_but_self_async(&action); -} |