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Start implementing smcCpuSuspend

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This commit is contained in:
Michael Scire 2018-02-26 02:00:02 -08:00
parent 18d0a81bd5
commit bda9dcbe73
12 changed files with 241 additions and 20 deletions
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22
exosphere/src/bpmp.h Normal file
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@ -0,0 +1,22 @@
#ifndef EXOSPHERE_BPMP_H
#define EXOSPHERE_BPMP_H
#include <stdint.h>
#include "memory_map.h"
/* Exosphere register definitions for the Tegra X1 BPMP vectors. */
#define BPMP_VECTOR_BASE (mmio_get_device_address(MMIO_DEVID_EXCEPTION_VECTORS))
#define BPMP_VECTOR_RESET (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x200)))
#define BPMP_VECTOR_UNDEF (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x204)))
#define BPMP_VECTOR_SWI (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x208)))
#define BPMP_VECTOR_PREFETCH_ABORT (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x20C)))
#define BPMP_VECTOR_DATA_ABORT (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x210)))
#define BPMP_VECTOR_UNK (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x214)))
#define BPMP_VECTOR_IRQ (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x218)))
#define BPMP_VECTOR_FIQ (*((volatile uint32_t *)(BPMP_VECTOR_BASE + 0x21C)))
#endif

12
exosphere/src/configitem.c
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@ -8,15 +8,15 @@
#include "fuse.h"
#include "utils.h"
static int g_battery_profile = 0;
static bool g_battery_profile = false;
uint32_t configitem_set(enum ConfigItem item, uint64_t value) {
if (item != CONFIGITEM_BATTERYPROFILE) {
return 2;
}
g_battery_profile = ((int)(value != 0)) & 1;
return 0; /* FIXME: what should we return there */
g_battery_profile = (value != 0);
return 0;
}
bool configitem_is_recovery_boot(void) {
@ -37,6 +37,10 @@ bool configitem_is_retail(void) {
return is_retail != 0;
}
bool configitem_should_profile_battery(void) {
return g_battery_profile;
}
uint32_t configitem_get(enum ConfigItem item, uint64_t *p_outvalue) {
uint32_t result = 0;
switch (item) {
@ -80,7 +84,7 @@ uint32_t configitem_get(enum ConfigItem item, uint64_t *p_outvalue) {
*p_outvalue = bootconfig_get_kernel_memory_configuration();
break;
case CONFIGITEM_BATTERYPROFILE:
*p_outvalue = g_battery_profile;
*p_outvalue = (int)g_battery_profile;
break;
default:
result = 2;

1
exosphere/src/configitem.h
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@ -25,5 +25,6 @@ uint32_t configitem_get(enum ConfigItem item, uint64_t *p_outvalue);
bool configitem_is_recovery_boot(void);
bool configitem_is_retail(void);
bool configitem_should_profile_battery(void);
#endif

16
exosphere/src/cpu_context.c
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@ -6,12 +6,12 @@
static saved_cpu_context_t g_cpu_contexts[NUM_CPU_CORES] = {0};
void set_core_entrypoint_and_context_id(uint32_t core, uint64_t entrypoint_addr, uint64_t context_id) {
void set_core_entrypoint_and_context_id(uint32_t core, uint64_t entrypoint_addr, uint64_t argument) {
g_cpu_contexts[core].ELR_EL3 = entrypoint_addr;
g_cpu_contexts[core].context_id = context_id;
g_cpu_contexts[core].argument = argument;
}
uint32_t cpu_on(uint32_t core, uint64_t entrypoint_addr, uint64_t context_id) {
uint32_t cpu_on(uint32_t core, uint64_t entrypoint_addr, uint64_t argument) {
/* Is core valid? */
if (core >= NUM_CPU_CORES) {
return 0xFFFFFFFE;
@ -22,7 +22,7 @@ uint32_t cpu_on(uint32_t core, uint64_t entrypoint_addr, uint64_t context_id) {
return 0xFFFFFFFC;
}
set_core_entrypoint_and_context_id(core, entrypoint_addr, context_id);
set_core_entrypoint_and_context_id(core, entrypoint_addr, argument);
const uint32_t status_masks[NUM_CPU_CORES] = {0x4000, 0x200, 0x400, 0x800};
const uint32_t toggle_vals[NUM_CPU_CORES] = {0xE, 0x9, 0xA, 0xB};
@ -60,11 +60,3 @@ uint32_t cpu_off(void) {
return 0;
/* TODO */
}
uint32_t cpu_suspend(uint64_t power_state, uint64_t entrypoint_addr, uint64_t context_id) {
(void)power_state;
(void)entrypoint_addr;
(void)context_id;
return 0;
/* TODO */
}

7
exosphere/src/cpu_context.h
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@ -6,7 +6,7 @@
/* Exosphere CPU Management functionality. */
typedef struct {
uint64_t context_id;
uint64_t argument;
uint64_t ELR_EL3;
int is_active;
int is_saved;
@ -44,11 +44,10 @@ typedef struct {
#define NUM_CPU_CORES 4
void set_core_entrypoint_and_context_id(uint32_t core, uint64_t entrypoint_addr, uint64_t context_id);
void set_core_entrypoint_and_argument(uint32_t core, uint64_t entrypoint_addr, uint64_t argument);
uint32_t cpu_on(uint32_t core, uint64_t entrypoint_addr, uint64_t context_id);
uint32_t cpu_on(uint32_t core, uint64_t entrypoint_addr, uint64_t argument);
uint32_t cpu_off(void); /* TODO */
uint32_t cpu_suspend(uint64_t power_state, uint64_t entrypoint_addr, uint64_t context_id); /* TODO */
#endif

46
exosphere/src/flow.h Normal file
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@ -0,0 +1,46 @@
#ifndef EXOSPHERE_FLOW_CTLR_H
#define EXOSPHERE_FLOW_CTLR_H
#include <stdint.h>
#include "cpu_context.h"
#include "memory_map.h"
/* Exosphere register definitions for the Tegra X1 Flow Controller. */
#define FLOW_BASE (mmio_get_device_address(MMIO_DEVID_FLOWCTRL))
#define MAKE_FLOW_REG(ofs) (*((volatile uint32_t *)(FLOW_BASE + ofs)))
#define FLOW_CTLR_HALT_COP_EVENTS_0 MAKE_FLOW_REG(0x004)
#define FLOW_CTLR_L2FLUSH_CONTROL_0 MAKE_FLOW_REG(0x094)
static const struct {
unsigned int CPUN_CSR_OFS;
unsigned int HALT_CPUN_EVENTS_OFS;
unsigned int CC4_COREN_CTRL_OFS;
} g_flow_core_offsets[NUM_CPU_CORES] = {
{0x008, 0x000, 0x06C},
{0x018, 0x014, 0x070},
{0x020, 0x01C, 0x074},
{0x028, 0x024, 0x078},
};
static inline void flow_set_cc4_ctrl(uint32_t core, uint32_t cc4_ctrl) {
MAKE_FLOW_REG(g_flow_core_offsets[core].CC4_COREN_CTRL_OFS) = cc4_ctrl;
}
static inline void flow_set_halt_events(uint32_t core, uint32_t halt_events) {
MAKE_FLOW_REG(g_flow_core_offsets[core].HALT_CPUN_EVENTS_OFS) = halt_events;
}
static inline void flow_set_csr(uint32_t core, uint32_t csr) {
MAKE_FLOW_REG(g_flow_core_offsets[core].CPUN_CSR_OFS) = csr;
}
static inline void flow_clear_csr0_and_events(uint32_t core) {
MAKE_FLOW_REG(g_flow_core_offsets[core].CPUN_CSR_OFS) = 0;
MAKE_FLOW_REG(g_flow_core_offsets[core].HALT_CPUN_EVENTS_OFS) = 0;
}
#endif

128
exosphere/src/lp0.c Normal file
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@ -0,0 +1,128 @@
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "utils.h"
#include "bpmp.h"
#include "configitem.h"
#include "flow.h"
#include "fuse.h"
#include "i2c.h"
#include "lp0.h"
#include "pmc.h"
#include "se.h"
#include "smc_api.h"
#include "timers.h"
/* Save security engine, and go to sleep. */
void save_se_and_power_down_cpu(void) {
clear_priv_smc_in_progress();
/* TODO. */
}
uint32_t cpu_suspend(uint64_t power_state, uint64_t entrypoint, uint64_t argument) {
/* Ensure SMC call is to enter deep sleep. */
if ((power_state & 0x17FFF) != 0x1001B) {
return 0xFFFFFFFD;
}
unsigned int current_core = get_core_id();
/* TODO: Enable clock and reset for I2C1. */
if (configitem_should_profile_battery() && !i2c_query_ti_charger_bit_7()) {
/* Profile the battery. */
i2c_set_ti_charger_bit_7();
uint32_t start_time = get_time();
bool should_wait = true;
/* TODO: This is GPIO-6 GPIO_IN_1 */
while ((*((volatile uint32_t *)(mmio_get_device_address(MMIO_DEVID_GPIO) + 0x634))) & 1) {
if (get_time() - start_time > 50000) {
should_wait = false;
break;
}
}
if (should_wait) {
wait(0x100);
}
}
/* TODO: Reset I2C1 controller. */
/* Enable LP0 Wake Event Detection. */
wait(75);
APBDEV_PMC_CNTRL2_0 |= 0x200; /* Set WAKE_DET_EN. */
wait(75);
APBDEV_PM_0 = 0xFFFFFFFF; /* Set all wake events. */
APBDEV_PMC_WAKE2_STATUS_0 = 0xFFFFFFFF; /* Set all wake events. */
wait(75);
/* TODO: Enable I2C5 Clock/Reset. */
if (fuse_get_bootrom_patch_version() >= 0x7F) {
i2c_send_pmic_cpu_shutdown_cmd();
}
/* Jamais Vu mitigation #1: Ensure all other cores are off. */
if (APBDEV_PMC_PWRGATE_STATUS_0 & 0xE00) {
generic_panic();
}
/* Jamais Vu mitigation #2: Ensure the BPMP is halted. */
if ((get_debug_authentication_status() & 3) == 3) {
/* BPMP should just be plainly halted, in debugging conditions. */
if (FLOW_CTLR_HALT_COP_EVENTS_0 != 0x50000000) {
generic_panic();
}
} else {
/* BPMP must be in never-woken-up halt mode, under normal conditions. */
if (FLOW_CTLR_HALT_COP_EVENTS_0 != 0x40000000) {
generic_panic();
}
}
/* TODO: Jamais Vu mitigation #3: Ensure all relevant DMA controllers are held in reset. */
/* This just requires checking CLK_RST_CONTROLLER_RST_DEVICES_H_0 & mask == 0x4000004. */
/* Signal to bootrom the next reset should be a warmboot. */
APBDEV_PMC_SCRATCH0_0 = 1;
APBDEV_PMC_DPD_ENABLE_0 |= 2;
/* Prepare to boot the BPMP running our deep sleep firmware. */
/* Mark PMC registers as not secure-world only, so BPMP can access them. */
(*((volatile uint32_t *)(mmio_get_device_address(MMIO_DEVID_MISC) + 0xC00))) &= 0xFFFFDFFF; /* TODO: macro */
/* Setup BPMP vectors. */
BPMP_VECTOR_RESET = 0x40003000; /* lp0_entry_firmware_crt0 */
BPMP_VECTOR_UNDEF = 0x40003004; /* Reboot. */
BPMP_VECTOR_SWI = 0x40003004; /* Reboot. */
BPMP_VECTOR_PREFETCH_ABORT = 0x40003004; /* Reboot. */
BPMP_VECTOR_DATA_ABORT = 0x40003004; /* Reboot. */
BPMP_VECTOR_UNK = 0x40003004; /* Reboot. */
BPMP_VECTOR_IRQ = 0x40003004; /* Reboot. */
BPMP_VECTOR_FIQ = 0x40003004; /* Reboot. */
/* TODO: Hold the BPMP in reset. */
uint8_t *lp0_entry_code = (uint8_t *)(lp0_get_plaintext_ram_segment_address(LP0_ENTRY_RAM_SEGMENT_ID_LP0_ENTRY_CODE));
(void)(lp0_entry_code);
/* TODO: memcpy(lp0_entry_code, BPMP_FIRMWARE_ADDRESS, sizeof(BPMP_FIRMWARE)); */
/* TODO: flush_dcache_range(lp0_entry_code, lp0_entry_code + sizeof(BPMP_FIRMWARE)); */
/* TODO: Take the BPMP out of reset. */
/* Start executing BPMP firmware. */
FLOW_CTLR_HALT_COP_EVENTS_0 = 0;
/* Prepare the current core for sleep. */
flow_set_cc4_ctrl(current_core, 0);
flow_set_halt_events(current_core, 0);
FLOW_CTLR_L2FLUSH_CONTROL_0 = 0;
flow_set_csr(current_core, 2);
/* Save core context. */
set_core_entrypoint_and_argument(current_core, entrypoint, argument);
/* TODO: save_current_core_context(); */
/* TODO: set_current_core_inacctive(); */
/* TODO: set_current_core_saved(true); */
/* TODO: call_with_stack_pointer(tzram_get_segment_address(TZRAM_SEGMENT_ID_CORE012_STACK) + 0x1000ULL, save_se_and_power_down_cpu); */
/* NOTE: This return never actually occurs. */
return 0;
}

10
exosphere/src/lp0.h Normal file
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@ -0,0 +1,10 @@
#ifndef EXOSPHERE_LP0_H
#define EXOSPHERE_LP0_H
#include <stdint.h>
/* Exosphere Deep Sleep Entry implementation. */
uint32_t cpu_suspend(uint64_t power_state, uint64_t entrypoint, uint64_t argument);
#endif

8
exosphere/src/pmc.h
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@ -8,7 +8,15 @@
#define PMC_BASE (mmio_get_device_address(MMIO_DEVID_RTC_PMC) + 0x400ULL)
#define APBDEV_PMC_DPD_ENABLE_0 (*((volatile uint32_t *)(PMC_BASE + 0x24)))
#define APBDEV_PMC_PWRGATE_TOGGLE_0 (*((volatile uint32_t *)(PMC_BASE + 0x30)))
#define APBDEV_PMC_PWRGATE_STATUS_0 (*((volatile uint32_t *)(PMC_BASE + 0x38)))
#define APBDEV_PMC_SCRATCH0_0 (*((volatile uint32_t *)(PMC_BASE + 0x50)))
#define APBDEV_PM_0 (*((volatile uint32_t *)(PMC_BASE + 0x14)))
#define APBDEV_PMC_WAKE2_STATUS_0 (*((volatile uint32_t *)(PMC_BASE + 0x168)))
#define APBDEV_PMC_CNTRL2_0 (*((volatile uint32_t *)(PMC_BASE + 0x440)))
#endif

1
exosphere/src/smc_api.c
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@ -18,6 +18,7 @@
#include "se.h"
#include "userpage.h"
#include "titlekey.h"
#include "lp0.h"
#define SMC_USER_HANDLERS 0x13
#define SMC_PRIV_HANDLERS 0x9

4
exosphere/src/timers.h
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@ -12,4 +12,8 @@
void wait(uint32_t microseconds);
static inline uint32_t get_time(void) {
return TIMERUS_CNTR_1US_0;
}
#endif

6
exosphere/src/utils.h
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@ -42,6 +42,12 @@ static inline unsigned int get_core_id(void) {
return (unsigned int)core_id & 3;
}
static inline uint64_t get_debug_authentication_status(void) {
uint64_t debug_auth;
__asm__ __volatile__ ("mrs %0, dbgauthstatus_el1" : "=r"(debug_auth));
return debug_auth;
}
static inline bool check_32bit_additive_overflow(uint32_t a, uint32_t b) {
return __builtin_add_overflow_p(a, b, (uint32_t)0);
}