mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-29 01:28:10 +00:00
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
// supervisor call functions
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#define SVC_ENABLE_IRQ 0
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#define SVC_DISABLE_IRQ 1
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#define SVC_SET_PRIORITY 2
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#define SVC_SHUTDOWN 4
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#define SVC_REBOOT_TO_BOOTLOADER 5
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// from util.s
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extern void shutdown_privileged(void);
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extern void reboot_to_bootloader(void);
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static inline uint32_t is_mode_unprivileged(void) {
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uint32_t r0;
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__asm__ volatile("mrs %0, control" : "=r"(r0));
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return r0 & 1;
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}
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static inline uint32_t is_mode_handler(void) {
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uint32_t r0;
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__asm__ volatile("mrs %0, ipsr" : "=r"(r0));
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return (r0 & 0x1FF) != 0;
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}
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static inline void svc_enableIRQ(uint32_t IRQn) {
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if (is_mode_unprivileged() && !is_mode_handler()) {
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register uint32_t r0 __asm__("r0") = IRQn;
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__asm__ __volatile__("svc %0" ::"i"(SVC_ENABLE_IRQ), "r"(r0) : "memory");
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} else {
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HAL_NVIC_EnableIRQ(IRQn);
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}
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}
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static inline void svc_disableIRQ(uint32_t IRQn) {
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if (is_mode_unprivileged() && !is_mode_handler()) {
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register uint32_t r0 __asm__("r0") = IRQn;
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__asm__ __volatile__("svc %0" ::"i"(SVC_DISABLE_IRQ), "r"(r0) : "memory");
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} else {
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HAL_NVIC_DisableIRQ(IRQn);
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}
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}
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static inline void svc_setpriority(uint32_t IRQn, uint32_t priority) {
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if (is_mode_unprivileged() && !is_mode_handler()) {
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register uint32_t r0 __asm__("r0") = IRQn;
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register uint32_t r1 __asm__("r1") = priority;
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__asm__ __volatile__("svc %0" ::"i"(SVC_SET_PRIORITY), "r"(r0), "r"(r1)
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: "memory");
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} else {
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NVIC_SetPriority(IRQn, priority);
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}
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}
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static inline void svc_shutdown(void) {
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if (is_mode_unprivileged() && !is_mode_handler()) {
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__asm__ __volatile__("svc %0" ::"i"(SVC_SHUTDOWN) : "memory");
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} else {
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shutdown_privileged();
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}
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}
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static inline void svc_reboot_to_bootloader(void) {
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if (is_mode_unprivileged() && !is_mode_handler()) {
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__asm__ __volatile__("svc %0" ::"i"(SVC_REBOOT_TO_BOOTLOADER) : "memory");
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} else {
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reboot_to_bootloader();
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}
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}
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