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subhobhai943
70d5925b16
- Implement AArch64 HAL, vector table (16 aligned vectors), GICv2, Generic Timer, Stage-1 MMU (39-bit VA), PL011 UART - Build unified multi-architecture abstraction layer in include/arch/arch.h - Create interactive Linux-like Kconfig TUI menuconfig in scripts/kconfig/menuconfig.py - Support make menuconfig, defconfig, x86_64_defconfig, aarch64_defconfig - Update master Makefile for cross-compiling x86_64 (x86_64-elf-) and AArch64 (aarch64-linux-gnu-) - Dynamic architecture awareness across printk, uname, neofetch, and LazyBox
96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
#ifndef _ARCH_AARCH64_IO_H
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#define _ARCH_AARCH64_IO_H
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#include <stdint.h>
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static inline void mmio_write8(uintptr_t reg, uint8_t val) {
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*(volatile uint8_t*)reg = val;
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}
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static inline uint8_t mmio_read8(uintptr_t reg) {
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return *(volatile uint8_t*)reg;
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}
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static inline void mmio_write16(uintptr_t reg, uint16_t val) {
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*(volatile uint16_t*)reg = val;
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}
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static inline uint16_t mmio_read16(uintptr_t reg) {
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return *(volatile uint16_t*)reg;
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}
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static inline void mmio_write32(uintptr_t reg, uint32_t val) {
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*(volatile uint32_t*)reg = val;
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}
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static inline uint32_t mmio_read32(uintptr_t reg) {
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return *(volatile uint32_t*)reg;
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}
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static inline void mmio_write64(uintptr_t reg, uint64_t val) {
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*(volatile uint64_t*)reg = val;
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}
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static inline uint64_t mmio_read64(uintptr_t reg) {
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return *(volatile uint64_t*)reg;
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}
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// Memory barriers
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static inline void dsb(void) {
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__asm__ volatile("dsb sy" ::: "memory");
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}
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static inline void dmb(void) {
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__asm__ volatile("dmb sy" ::: "memory");
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}
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static inline void isb(void) {
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__asm__ volatile("isb" ::: "memory");
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}
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// x86 I/O Port Emulation / Stubs for Portable Device Drivers
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static inline void outb(uint16_t port, uint8_t val) {
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(void)port; (void)val;
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}
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static inline uint8_t inb(uint16_t port) {
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(void)port;
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return 0;
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}
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static inline void outw(uint16_t port, uint16_t val) {
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(void)port; (void)val;
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}
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static inline uint16_t inw(uint16_t port) {
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(void)port;
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return 0;
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}
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static inline void outl(uint16_t port, uint32_t val) {
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(void)port; (void)val;
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}
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static inline uint32_t inl(uint16_t port) {
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(void)port;
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return 0;
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}
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static inline void io_wait(void) {
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__asm__ volatile("nop");
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}
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static inline void cli(void) {
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__asm__ volatile("msr daifset, #2" ::: "memory");
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}
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static inline void sti(void) {
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__asm__ volatile("msr daifclr, #2" ::: "memory");
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}
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static inline void hlt(void) {
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__asm__ volatile("wfi");
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}
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#endif // _ARCH_AARCH64_IO_H
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