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/*
* This file is part of the libpayload project.
*
* Copyright 2014 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ARCH_EXCEPTION_H
#define _ARCH_EXCEPTION_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)
#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;
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;
#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,
EXC_IRQ_SP0,
EXC_FIQ_SP0,
EXC_SERROR_SP0,
EXC_SYNC_SPX,
EXC_IRQ_SPX,
EXC_FIQ_SPX,
EXC_SERROR_SPX,
EXC_SYNC_ELX_64,
EXC_IRQ_ELX_64,
EXC_FIQ_ELX_64,
EXC_SERROR_ELX_64,
EXC_SYNC_ELX_32,
EXC_IRQ_ELX_32,
EXC_FIQ_ELX_32,
EXC_SERROR_ELX_32,
EXC_COUNT
};
#endif /* !__ASSEMBLER__ */
#endif
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