Fábio Coutada
62e8454f91
- make-uefi-iso.sh: UEFI ISO image builder - test_boot.S, test_boot.ld: test boot assembly and linker script - eim_config.toml: EIM (External Interface Module) configuration - edk2-ovmf RPM for UEFI firmware - GAP_ANALYSIS_PIKEOS_PARITY.md: PikeOS parity gap analysis
136 lines
4.8 KiB
C
136 lines
4.8 KiB
C
/*
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* UniversalisOS Microkernel — Compiler Abstraction
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*
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* Hides GCC/Clang/IAR/MSVC differences behind uos_* macros.
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*/
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#ifndef UOS_COMPILER_H
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#define UOS_COMPILER_H
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/* === Alignment === */
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#define UOS_ALIGN(x, a) (((x) + ((a) - 1)) & ~((a) - 1))
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#define UOS_ALIGN_DOWN(x, a) ((x) & ~((a) - 1))
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#define UOS_IS_ALIGNED(x, a) (((x) & ((a) - 1)) == 0)
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/* === Section attributes === */
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#if defined(__GNUC__) || defined(__clang__)
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#define UOS_SECTION(s) __attribute__((section(s)))
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#define UOS_ALIGNED(a) __attribute__((aligned(a)))
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#define UOS_UNUSED __attribute__((unused))
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#define UOS_NORETURN __attribute__((noreturn))
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#define UOS_WEAK __attribute__((weak))
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#define UOS_PACKED __attribute__((packed))
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#define UOS_INLINE static inline __attribute__((always_inline))
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#define UOS_NOINLINE __attribute__((noinline))
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#define UOS_LIKELY(x) __builtin_expect(!!(x), 1)
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#define UOS_UNLIKELY(x) __builtin_expect(!!(x), 0)
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#elif defined(__ICCARM__) /* IAR */
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#define UOS_SECTION(s) @ s
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#define UOS_ALIGNED(a) _Pragma(#a)
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#define UOS_UNUSED
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#define UOS_NORETURN __noreturn
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#define UOS_WEAK __weak
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#define UOS_PACKED __packed
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#define UOS_INLINE static inline
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#define UOS_NOINLINE
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#define UOS_LIKELY(x) (x)
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#define UOS_UNLIKELY(x) (x)
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#else
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#error "Unsupported compiler — add compiler abstraction macros"
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#endif
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/* === Interrupt control (ARM) === */
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#if defined(__arm__) || defined(__aarch64__)
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#define UOS_DISABLE_IRQ() do { __asm__ volatile("cpsid i" ::: "memory"); } while(0)
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#define UOS_ENABLE_IRQ() do { __asm__ volatile("cpsie i" ::: "memory"); } while(0)
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#define UOS_DSB() do { __asm__ volatile("dsb" ::: "memory"); } while(0)
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#define UOS_ISB() do { __asm__ volatile("isb" ::: "memory"); } while(0)
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#define UOS_WFI() do { __asm__ volatile("wfi"); } while(0)
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#define UOS_WFE() do { __asm__ volatile("wfe"); } while(0)
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#elif defined(__riscv)
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#define UOS_DISABLE_IRQ() do { __asm__ volatile("csrci mstatus, 0x8" ::: "memory"); } while(0)
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#define UOS_ENABLE_IRQ() do { __asm__ volatile("csrsi mstatus, 0x8" ::: "memory"); } while(0)
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#define UOS_DSB()
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#define UOS_ISB()
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#define UOS_WFI() do { __asm__ volatile("wfi"); } while(0)
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#define UOS_WFE()
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#elif defined(__AVR__)
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#include <avr/interrupt.h>
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#define UOS_DISABLE_IRQ() cli()
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#define UOS_ENABLE_IRQ() sei()
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#define UOS_DSB()
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#define UOS_ISB()
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#define UOS_WFI() do { __asm__ volatile("sleep"); } while(0)
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#define UOS_WFE()
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#elif defined(__XTENSA__)
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#define UOS_DISABLE_IRQ() do { __asm__ volatile("rsil a2, 15" ::: "memory"); } while(0)
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#define UOS_ENABLE_IRQ() do { __asm__ volatile("rsil a2, 0" ::: "memory"); } while(0)
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#define UOS_DSB()
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#define UOS_ISB()
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#define UOS_WFI() do { __asm__ volatile("waiti 0"); } while(0)
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#define UOS_WFE()
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#else
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#define UOS_DISABLE_IRQ()
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#define UOS_ENABLE_IRQ()
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#define UOS_DSB()
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#define UOS_ISB()
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#define UOS_WFI()
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#define UOS_WFE()
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#endif
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/* === Critical section (saved state) === */
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typedef uint32_t uos_irq_state_t;
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UOS_INLINE uos_irq_state_t uos_critical_enter(void) {
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uos_irq_state_t state;
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#if defined(__arm__) || defined(__aarch64__)
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__asm__ volatile("mrs %0, primask\ncpsid i" : "=r"(state) :: "memory");
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#elif defined(__riscv)
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__asm__ volatile("csrrci %0, mstatus, 0x8" : "=r"(state) :: "memory");
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#elif defined(__AVR__)
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state = SREG; cli();
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#elif defined(__XTENSA__)
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__asm__ volatile("rsil %0, 15" : "=r"(state) :: "memory");
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#else
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state = 0;
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#endif
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return state;
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}
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UOS_INLINE void uos_critical_exit(uos_irq_state_t state) {
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#if defined(__arm__) || defined(__aarch64__)
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__asm__ volatile("msr primask, %0" :: "r"(state) : "memory");
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#elif defined(__riscv)
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__asm__ volatile("csrw mstatus, %0" :: "r"(state) : "memory");
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#elif defined(__AVR__)
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SREG = state;
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#elif defined(__XTENSA__)
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__asm__ volatile("wsr %0, ps" :: "r"(state) : "memory");
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#else
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(void)state;
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#endif
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}
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/* === Bitmap operations (used by scheduler) === */
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UOS_INLINE uint32_t uos_clz(uint32_t x) {
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#if defined(__GNUC__) || defined(__clang__)
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return __builtin_clz(x);
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#else
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uint32_t n = 0;
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if (x == 0) return 32;
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if (!(x & 0xFFFF0000)) { n += 16; x <<= 16; }
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if (!(x & 0xFF000000)) { n += 8; x <<= 8; }
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if (!(x & 0xF0000000)) { n += 4; x <<= 4; }
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if (!(x & 0xC0000000)) { n += 2; x <<= 2; }
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if (!(x & 0x80000000)) { n += 1; }
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return n;
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#endif
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}
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/* === Compile-time assertion === */
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#define UOS_STATIC_ASSERT(cond, msg) _Static_assert(cond, msg)
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/* === Container of macro (like Linux container_of) === */
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#define UOS_CONTAINER_OF(ptr, type, member) \
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((type *)((char *)(ptr) - offsetof(type, member)))
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#endif /* UOS_COMPILER_H */
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