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#ifndef _RISCV_MTRAP_H
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#define _RISCV_MTRAP_H
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#include "encoding.h"
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#ifdef __riscv_atomic
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# define MAX_HARTS 8 // arbitrary
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#else
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# define MAX_HARTS 1
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#endif
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#include <stddef.h>
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#include <stdarg.h>
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#define read_const_csr(reg) ({ unsigned long __tmp; \
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asm ("csrr %0, " #reg : "=r"(__tmp)); \
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__tmp; })
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static inline int supports_extension(char ext)
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{
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return read_const_csr(misa) & (1 << (ext - 'A'));
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}
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static inline int xlen()
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{
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return read_const_csr(misa) < 0 ? 64 : 32;
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}
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extern uintptr_t mem_size;
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extern volatile uint64_t* mtime;
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extern volatile uint32_t* plic_priorities;
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extern size_t plic_ndevs;
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typedef struct {
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volatile uint32_t* ipi;
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volatile int mipi_pending;
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volatile uint64_t* timecmp;
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volatile uint32_t* plic_m_thresh;
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volatile uintptr_t* plic_m_ie;
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volatile uint32_t* plic_s_thresh;
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volatile uintptr_t* plic_s_ie;
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} hls_t;
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#define MACHINE_STACK_TOP() ({ \
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register uintptr_t sp asm ("sp"); \
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(void*)((sp + RISCV_PGSIZE) & -RISCV_PGSIZE); })
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// hart-local storage, at top of stack
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#define HLS() ((hls_t*)(MACHINE_STACK_TOP() - HLS_SIZE))
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#define OTHER_HLS(id) ((hls_t*)((void*)HLS() + RISCV_PGSIZE * ((id) - read_const_csr(mhartid))))
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hls_t* hls_init(uintptr_t hart_id);
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void parse_config_string();
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void poweroff(uint16_t code) __attribute((noreturn));
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void printm(const char* s, ...);
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void vprintm(const char *s, va_list args);
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void putstring(const char* s);
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#define assert(x) ({ if (!(x)) die("assertion failed: %s", #x); })
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#define die(str, ...) ({ printm("%s:%d: " str "\n", __FILE__, __LINE__, ##__VA_ARGS__); poweroff(-1); })
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void enter_supervisor_mode(void (*fn)(uintptr_t), uintptr_t arg0, uintptr_t arg1, uintptr_t arg2)
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__attribute__((noreturn));
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void boot_loader(uintptr_t dtb);
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void boot_other_hart(uintptr_t dtb);
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static inline void wfi()
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{
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asm volatile ("wfi" ::: "memory");
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}
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#endif // !__ASSEMBLER__
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#define IPI_SOFT 0x1
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#define IPI_FENCE_I 0x2
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#define IPI_SFENCE_VMA 0x4
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#define MACHINE_STACK_SIZE RISCV_PGSIZE
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#define MENTRY_HLS_OFFSET (INTEGER_CONTEXT_SIZE + SOFT_FLOAT_CONTEXT_SIZE)
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#define MENTRY_FRAME_SIZE (MENTRY_HLS_OFFSET + HLS_SIZE)
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#define MENTRY_IPI_OFFSET (MENTRY_HLS_OFFSET)
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#define MENTRY_IPI_PENDING_OFFSET (MENTRY_HLS_OFFSET + REGBYTES)
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#ifdef __riscv_flen
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# define SOFT_FLOAT_CONTEXT_SIZE 0
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#else
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# define SOFT_FLOAT_CONTEXT_SIZE (8 * 32)
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#endif
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#define HLS_SIZE 64
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#define INTEGER_CONTEXT_SIZE (32 * REGBYTES)
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#endif
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