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authorFurquan Shaikh <furquan@google.com>2015-10-15 15:50:30 -0700
committerJulius Werner <jwerner@chromium.org>2015-11-07 03:29:35 +0100
commitfdb3a8d07d46c0011555029e041890dc668ec7f0 (patch)
tree18594c3e21c1d153865360d09f727a0cad63e82e /src/arch/arm64
parentb3f6ad35221984419ee0998f47b778d669d1636e (diff)
downloadcoreboot-fdb3a8d07d46c0011555029e041890dc668ec7f0.tar.xz
arm64: Remove cpu intialization through device-tree
Since, SMP support is removed for ARM64, there is no need for CPU initialization to be performed via device-tree. Change-Id: I0534e6a93c7dc8659859eac926d17432d10243aa Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: http://review.coreboot.org/11913 Tested-by: build bot (Jenkins) Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/arch/arm64')
-rw-r--r--src/arch/arm64/Makefile.inc1
-rw-r--r--src/arch/arm64/c_entry.c75
-rw-r--r--src/arch/arm64/cpu_ramstage.c204
-rw-r--r--src/arch/arm64/include/armv8/arch/cpu.h34
4 files changed, 79 insertions, 235 deletions
diff --git a/src/arch/arm64/Makefile.inc b/src/arch/arm64/Makefile.inc
index b4ee3a5101..8bcad75867 100644
--- a/src/arch/arm64/Makefile.inc
+++ b/src/arch/arm64/Makefile.inc
@@ -131,7 +131,6 @@ ifeq ($(CONFIG_ARCH_RAMSTAGE_ARM64),y)
ramstage-y += c_entry.c
ramstage-y += stages.c
ramstage-y += div0.c
-ramstage-y += cpu_ramstage.c
ramstage-y += eabi_compat.c
ramstage-y += boot.c
ramstage-y += tables.c
diff --git a/src/arch/arm64/c_entry.c b/src/arch/arm64/c_entry.c
index deef83df7e..f26ed926b1 100644
--- a/src/arch/arm64/c_entry.c
+++ b/src/arch/arm64/c_entry.c
@@ -15,8 +15,11 @@
#include <arch/cache.h>
#include <arch/cpu.h>
+#include <arch/lib_helpers.h>
#include <arch/mmu.h>
#include <arch/stages.h>
+#include <gic.h>
+
#include "cpu-internal.h"
void __attribute__((weak)) arm64_soc_init(void)
@@ -42,10 +45,82 @@ static void seed_stack(void)
*slot++ = 0xdeadbeefdeadbeefULL;
}
+/* Set up default SCR values. */
+static void el3_init(void)
+{
+ uint32_t scr;
+
+ if (get_current_el() != EL3)
+ return;
+
+ scr = raw_read_scr_el3();
+ /* Default to non-secure EL1 and EL0. */
+ scr &= ~(SCR_NS_MASK);
+ scr |= SCR_NS_ENABLE;
+ /* Disable IRQ, FIQ, and external abort interrupt routing. */
+ scr &= ~(SCR_IRQ_MASK | SCR_FIQ_MASK | SCR_EA_MASK);
+ scr |= SCR_IRQ_DISABLE | SCR_FIQ_DISABLE | SCR_EA_DISABLE;
+ /* Enable HVC */
+ scr &= ~(SCR_HVC_MASK);
+ scr |= SCR_HVC_ENABLE;
+ /* Disable SMC */
+ scr &= ~(SCR_SMC_MASK);
+ scr |= SCR_SMC_DISABLE;
+ /* Disable secure instruction fetches. */
+ scr &= ~(SCR_SIF_MASK);
+ scr |= SCR_SIF_DISABLE;
+ /* All lower exception levels 64-bit by default. */
+ scr &= ~(SCR_RW_MASK);
+ scr |= SCR_LOWER_AARCH64;
+ /* Disable secure EL1 access to secure timer. */
+ scr &= ~(SCR_ST_MASK);
+ scr |= SCR_ST_DISABLE;
+ /* Don't trap on WFE or WFI instructions. */
+ scr &= ~(SCR_TWI_MASK | SCR_TWE_MASK);
+ scr |= SCR_TWI_DISABLE | SCR_TWE_DISABLE;
+ raw_write_scr_el3(scr);
+ isb();
+}
+
+void __attribute__((weak)) arm64_arch_timer_init(void)
+{
+ /* Default weak implementation does nothing. */
+}
+
static void arm64_init(void)
{
seed_stack();
+
+ /* Set up default SCR values. */
+ el3_init();
+
+ /* Initialize the GIC. */
+ gic_init();
+
+ /*
+ * Disable coprocessor traps to EL3:
+ * TCPAC [20] = 0, disable traps for EL2 accesses to CPTR_EL2 or HCPTR
+ * and EL2/EL1 access to CPACR_EL1.
+ * TTA [20] = 0, disable traps for trace register access from any EL.
+ * TFP [10] = 0, disable traps for floating-point instructions from any
+ * EL.
+ */
+ raw_write_cptr_el3(CPTR_EL3_TCPAC_DISABLE | CPTR_EL3_TTA_DISABLE |
+ CPTR_EL3_TFP_DISABLE);
+
+ /*
+ * Allow FPU accesses:
+ * FPEN [21:20] = 3, disable traps for floating-point instructions from
+ * EL0/EL1.
+ * TTA [28] = 0, disable traps for trace register access from EL0/EL1.
+ */
+ raw_write_cpacr_el1(CPACR_TRAP_FP_DISABLE | CPACR_TTA_DISABLE);
+
+ /* Arch Timer init: setup cntfrq per CPU */
+ arm64_arch_timer_init();
+
arm64_soc_init();
+
main();
}
diff --git a/src/arch/arm64/cpu_ramstage.c b/src/arch/arm64/cpu_ramstage.c
deleted file mode 100644
index c94c26fad1..0000000000
--- a/src/arch/arm64/cpu_ramstage.c
+++ /dev/null
@@ -1,204 +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 <stdint.h>
-#include <stdlib.h>
-#include <arch/cache.h>
-#include <arch/cpu.h>
-#include <arch/lib_helpers.h>
-#include <cpu/cpu.h>
-#include <console/console.h>
-#include <gic.h>
-#include <timer.h>
-#include "cpu-internal.h"
-
-static struct cpu_info cpu_info;
-
-void __attribute__((weak)) arm64_arch_timer_init(void)
-{
- /* Default weak implementation does nothing. */
-}
-
-static inline void cpu_disable_dev(device_t dev)
-{
- dev->enabled = 0;
-}
-
-static struct cpu_driver *locate_cpu_driver(uint32_t midr)
-{
- struct cpu_driver *cur;
-
- for (cur = _cpu_drivers; cur != _ecpu_drivers; cur++) {
- const struct cpu_device_id *id_table = cur->id_table;
-
- for (; id_table->midr != CPU_ID_END; id_table++) {
- if (id_table->midr == midr)
- return cur;
- }
- }
- return NULL;
-}
-
-static int cpu_set_device_operations(device_t dev)
-{
- uint32_t midr;
- struct cpu_driver *driver;
-
- midr = raw_read_midr_el1();
- driver = locate_cpu_driver(midr);
-
- if (driver == NULL) {
- printk(BIOS_WARNING, "No CPU driver for MIDR %08x\n", midr);
- return -1;
- }
- dev->ops = driver->ops;
- return 0;
-}
-
-/* Set up default SCR values. */
-static void el3_init(void)
-{
- uint32_t scr;
-
- if (get_current_el() != EL3)
- return;
-
- scr = raw_read_scr_el3();
- /* Default to non-secure EL1 and EL0. */
- scr &= ~(SCR_NS_MASK);
- scr |= SCR_NS_ENABLE;
- /* Disable IRQ, FIQ, and external abort interrupt routing. */
- scr &= ~(SCR_IRQ_MASK | SCR_FIQ_MASK | SCR_EA_MASK);
- scr |= SCR_IRQ_DISABLE | SCR_FIQ_DISABLE | SCR_EA_DISABLE;
- /* Enable HVC */
- scr &= ~(SCR_HVC_MASK);
- scr |= SCR_HVC_ENABLE;
- /* Disable SMC */
- scr &= ~(SCR_SMC_MASK);
- scr |= SCR_SMC_DISABLE;
- /* Disable secure instruction fetches. */
- scr &= ~(SCR_SIF_MASK);
- scr |= SCR_SIF_DISABLE;
- /* All lower exception levels 64-bit by default. */
- scr &= ~(SCR_RW_MASK);
- scr |= SCR_LOWER_AARCH64;
- /* Disable secure EL1 access to secure timer. */
- scr &= ~(SCR_ST_MASK);
- scr |= SCR_ST_DISABLE;
- /* Don't trap on WFE or WFI instructions. */
- scr &= ~(SCR_TWI_MASK | SCR_TWE_MASK);
- scr |= SCR_TWI_DISABLE | SCR_TWE_DISABLE;
- raw_write_scr_el3(scr);
- isb();
-}
-
-static void init_this_cpu(void)
-{
- struct cpu_info *ci = &cpu_info;
- device_t dev = ci->cpu;
-
- cpu_set_device_operations(dev);
-
- printk(BIOS_DEBUG, "CPU%x: MPIDR: %llx\n", ci->id, ci->mpidr);
-
- /* Initialize the GIC. */
- gic_init();
-
- /*
- * Disable coprocessor traps to EL3:
- * TCPAC [20] = 0, disable traps for EL2 accesses to CPTR_EL2 or HCPTR
- * and EL2/EL1 access to CPACR_EL1.
- * TTA [20] = 0, disable traps for trace register access from any EL.
- * TFP [10] = 0, disable traps for floating-point instructions from any
- * EL.
- */
- raw_write_cptr_el3(CPTR_EL3_TCPAC_DISABLE | CPTR_EL3_TTA_DISABLE |
- CPTR_EL3_TFP_DISABLE);
-
- /*
- * Allow FPU accesses:
- * FPEN [21:20] = 3, disable traps for floating-point instructions from
- * EL0/EL1.
- * TTA [28] = 0, disable traps for trace register access from EL0/EL1.
- */
- raw_write_cpacr_el1(CPACR_TRAP_FP_DISABLE | CPACR_TTA_DISABLE);
-
- /* Arch Timer init: setup cntfrq per CPU */
- arm64_arch_timer_init();
-
- if (dev->ops != NULL && dev->ops->init != NULL) {
- dev->initialized = 1;
- printk(BIOS_DEBUG, "%s init\n", dev_path(dev));
- dev->ops->init(dev);
- }
-}
-
-/* Fill in cpu_info structures according to device tree. */
-static void init_cpu_info(struct bus *bus)
-{
- device_t cur;
-
- for (cur = bus->children; cur != NULL; cur = cur->sibling) {
- struct cpu_info *ci;
- unsigned int id = cur->path.cpu.id;
-
- if (cur->path.type != DEVICE_PATH_CPU)
- continue;
-
- /* IDs are currently mapped 1:1 with logical CPU numbers. */
- if (id != 0) {
- printk(BIOS_WARNING,
- "CPU id %x too large. Disabling.\n", id);
- cpu_disable_dev(cur);
- continue;
- }
-
- ci = &cpu_info;
- if (ci->cpu != NULL) {
- printk(BIOS_WARNING,
- "Duplicate ID %x in device tree.\n", id);
- cpu_disable_dev(cur);
- }
-
- ci->cpu = cur;
- ci->id = cur->path.cpu.id;
- }
-}
-
-void arch_initialize_cpu(device_t cluster)
-{
- struct bus *bus;
-
- if (cluster->path.type != DEVICE_PATH_CPU_CLUSTER) {
- printk(BIOS_ERR,
- "CPU init failed. Device is not a CPU_CLUSTER: %s\n",
- dev_path(cluster));
- return;
- }
-
- bus = cluster->link_list;
-
- /* Check if no children under this device. */
- if (bus == NULL)
- return;
-
- el3_init();
-
- /* Initialize the cpu_info structures. */
- init_cpu_info(bus);
-
- /* Send it the init action. */
- init_this_cpu();
-}
diff --git a/src/arch/arm64/include/armv8/arch/cpu.h b/src/arch/arm64/include/armv8/arch/cpu.h
index 778909d94c..fdc34e5086 100644
--- a/src/arch/arm64/include/armv8/arch/cpu.h
+++ b/src/arch/arm64/include/armv8/arch/cpu.h
@@ -18,36 +18,6 @@
#define asmlinkage
-#if !defined(__PRE_RAM__)
-#include <arch/barrier.h>
-#include <arch/mpidr.h>
-#include <device/device.h>
-
-enum {
- CPU_ID_END = 0x00000000,
-};
-
-struct cpu_device_id {
- uint32_t midr;
-};
-
-struct cpu_driver {
- /* This is excessive as init() is the only one called. */
- struct device_operations *ops;
- const struct cpu_device_id *id_table;
-};
-
-struct cpu_info {
- device_t cpu;
- unsigned int id;
- uint64_t mpidr;
-};
-
-/* Initialize CPU0 under the DEVICE_PATH_CPU_CLUSTER cluster. */
-void arch_initialize_cpu(device_t cluster);
-
-#endif /* !__PRE_RAM__ */
-
static inline unsigned int smp_processor_id(void) { return 0; }
/*
@@ -63,4 +33,8 @@ void arm64_cpu_startup(void);
*/
void arm64_arch_timer_init(void);
+#if !defined(__PRE_RAM__)
+struct cpu_driver { };
+#endif
+
#endif /* __ARCH_CPU_H__ */