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Implement CPU state init, fix bug in cpu_context restore

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This commit is contained in:
Michael Scire 2018-03-02 14:16:54 -08:00
parent a292e95c2f
commit 301b166684
6 changed files with 55 additions and 3 deletions
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32
exosphere/src/bootup.c
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@ -19,6 +19,7 @@
#include "interrupt.h"
#include "cpu_context.h"
#include "actmon.h"
#include "syscrt0.h"
static bool g_has_booted_up = false;
@ -165,4 +166,35 @@ void bootup_misc_mmio(void) {
void setup_4x_mmio(void) {
/* TODO */
}
#define SET_SYSREG(reg, val) do { temp_reg = val; __asm__ __volatile__ ("msr " #reg ", %0" :: "r"(temp_reg) : "memory"); } while(false)
void setup_current_core_state(void) {
uint64_t temp_reg;
/* Setup system registers. */
SET_SYSREG(actlr_el3, 0x73ull);
SET_SYSREG(actlr_el2, 0x73ull);
SET_SYSREG(hcr_el2, 0x80000000ull);
SET_SYSREG(dacr32_el2, 0xFFFFFFFFull);
SET_SYSREG(sctlr_el1, 0xC50838ull);
SET_SYSREG(sctlr_el2, 0x30C50838ull);
do { __asm__ __volatile__ ("isb"); } while (false);
SET_SYSREG(cntfrq_el0, MAKE_SYSCRT0_REG(0x20)); /* TODO: Reg name. */
SET_SYSREG(cnthctl_el2, 3ull);
do { __asm__ __volatile__ ("isb"); } while (false);
/* Setup Interrupts, flow. */
flow_clear_csr0_and_events(get_core_id());
intr_initialize_gic();
intr_set_priority(INTERRUPT_ID_1C, 0);
intr_set_group(INTERRUPT_ID_1C, 0);
intr_set_enabled(INTERRUPT_ID_1C, 1);
/* Restore current core context. */
restore_current_core_context();
}

2
exosphere/src/bootup.h
View file

@ -7,4 +7,6 @@ void bootup_misc_mmio(void);
void setup_4x_mmio(void);
void setup_current_core_state(void);
#endif

4
exosphere/src/cpu_context.c
View file

@ -16,8 +16,8 @@
#define RESTORE_SYSREG64(reg) do { temp_reg = g_cpu_contexts[current_core].reg; __asm__ __volatile__ ("msr " #reg ", %0" :: "r"(temp_reg) : "memory"); } while(false)
#define RESTORE_SYSREG32(reg) RESTORE_SYSREG64(reg)
#define RESTORE_BP_REG(i, _) SAVE_SYSREG64(DBGBVR##i##_EL1); SAVE_SYSREG64(DBGBCR##i##_EL1);
#define RESTORE_WP_REG(i, _) SAVE_SYSREG64(DBGBVR##i##_EL1); SAVE_SYSREG64(DBGBCR##i##_EL1);
#define RESTORE_BP_REG(i, _) RESTORE_SYSREG64(DBGBVR##i##_EL1); RESTORE_SYSREG64(DBGBCR##i##_EL1);
#define RESTORE_WP_REG(i, _) RESTORE_SYSREG64(DBGBVR##i##_EL1); RESTORE_SYSREG64(DBGBCR##i##_EL1);
static saved_cpu_context_t g_cpu_contexts[NUM_CPU_CORES] = {0};

1
exosphere/src/interrupt.h
View file

@ -10,6 +10,7 @@
#define MAX_REGISTERED_INTERRUPTS 4
#define INTERRUPT_ID_SECURITY_ENGINE 0x5A
#define INTERRUPT_ID_ACTIVITY_MONITOR_4X 0x4D
#define INTERRUPT_ID_1C 0x1C
#define INTERRUPT_ID_USER_SECURITY_ENGINE 0x2C
static inline uintptr_t get_gicd_base(void) {

2
exosphere/src/package2.c
View file

@ -380,7 +380,7 @@ void load_package2(coldboot_crt0_reloc_list_t *reloc_list) {
bootup_misc_mmio();
/* TODO: initalize cpu context */
setup_current_core_state();
/* TODO: Read and save BOOTREASON stored by NX_BOOTLOADER at 0x1F009FE00 */

17
exosphere/src/syscrt0.h Normal file
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@ -0,0 +1,17 @@
#ifndef EXOSPHERE_SYSCRT0_H
#define EXOSPHERE_SYSCRT0_H
#include <stdint.h>
#include "memory_map.h"
/* Exosphere driver for the Tegra X1 SYSCRT0 Registers. */
#define SYSCRT0_BASE (MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_SYSCTR0))
#define MAKE_SYSCRT0_REG(n) (*((volatile uint32_t *)(SYSCRT0_BASE + n)))
#endif