diff options
Diffstat (limited to 'payloads/libpayload/include/arm64/arch/exception.h')
| -rw-r--r-- | payloads/libpayload/include/arm64/arch/exception.h | 90 |
1 files changed, 86 insertions, 4 deletions
diff --git a/payloads/libpayload/include/arm64/arch/exception.h b/payloads/libpayload/include/arm64/arch/exception.h index 8afe39103b..f699d3d6ed 100644 --- a/payloads/libpayload/include/arm64/arch/exception.h +++ b/payloads/libpayload/include/arm64/arch/exception.h @@ -30,18 +30,98 @@ #ifndef _ARCH_EXCEPTION_H #define _ARCH_EXCEPTION_H -#include <stdint.h> +#define EXCEPTION_STATE_ELR 0x0 +#define EXCEPTION_STATE_ESR 0x8 +#define EXCEPTION_STATE_SPSR 0x10 +#define EXCEPTION_STATE_SP 0x18 +#define EXCEPTION_STATE_REG(r) (0x20 + r * 0x8) + +#define ESR_EC_UNKNOWN 0b000000 +#define ESR_EC_SVC_64 0b010101 +#define ESR_EC_INSN_ABT_LOWER 0b100000 +#define ESR_EC_INSN_ABT_SAME 0b100001 +#define ESR_EC_DATA_ABT_LOWER 0b100100 +#define ESR_EC_DATA_ABT_SAME 0b100101 +#define ESR_EC_SERROR 0b101111 +#define ESR_EC_SS_SAME 0b110011 +#define ESR_EC_BKPT_64 0b111100 + +#define MDCR_TDE (1 << 8) -void set_vbar(void* vbar); +#define MDSCR_SS (1 << 0) +#define MDSCR_KDE (1 << 13) +#define MDSCR_MDE (1 << 15) + +#ifndef __ASSEMBLER__ + +#include <stddef.h> +#include <stdint.h> struct exception_state { uint64_t elr; - uint64_t esr; + union { + uint64_t esr; + union { + struct { + uint64_t iss : 25; + uint64_t il : 1; + uint64_t ec : 6; + uint64_t _res0 : 32; + }; + struct { + uint64_t isfc : 6; + uint64_t _res0 : 1; + uint64_t s1ptw : 1; + uint64_t _res1 : 1; + uint64_t ea : 1; + uint64_t fnv : 1; + uint64_t _res2 : 53; + } insn_abt; + }; + }; + union { + uint32_t spsr; + struct { + uint32_t sp : 1; /* M[0] */ + uint32_t _res0 : 1; /* M[1] */ + uint32_t el : 2; /* M[3:2] */ + uint32_t arch : 1; /* M[4] */ + uint32_t _res1 : 1; + uint32_t f : 1; + uint32_t i : 1; + uint32_t a : 1; + uint32_t d : 1; + uint32_t _res2 : 10; + uint32_t il : 1; + uint32_t ss : 1; + uint32_t _res3 : 6; + uint32_t v : 1; + uint32_t c : 1; + uint32_t z : 1; + uint32_t n : 1; + } pstate; + }; + uint32_t spsr_high_unused; + uint64_t sp; uint64_t regs[31]; } __packed; -extern struct exception_state *exception_state; +#define CHECK_ES(field, constant) \ + _Static_assert(offsetof(struct exception_state, field) == constant, \ + "(struct exception_state)." #field " doesn't match constant " #constant) +CHECK_ES(elr, EXCEPTION_STATE_ELR); +CHECK_ES(esr, EXCEPTION_STATE_ESR); +CHECK_ES(spsr, EXCEPTION_STATE_SPSR); +CHECK_ES(sp, EXCEPTION_STATE_SP); +CHECK_ES(regs[0], EXCEPTION_STATE_REG(0)); +CHECK_ES(regs[30], EXCEPTION_STATE_REG(30)); + +extern struct exception_state exception_state; +extern u64 exception_stack[]; +extern u64 *exception_stack_end; + +void exception_set_state_ptr(struct exception_state *exception_state_ptr); enum { EXC_SYNC_SP0 = 0, @@ -63,4 +143,6 @@ enum { EXC_COUNT }; +#endif /* !__ASSEMBLER__ */ + #endif |