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Keyboard Work - setting up PLIC, UART, Interrupts

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This commit is contained in:
Liam Kerr 2026-02-10 01:21:49 +00:00
parent 4c0a4958a2
commit 50757427be
12 changed files with 295 additions and 68 deletions
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23
src/kernel/plic.h Normal file
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#ifndef PLIC_H
#define PLIC_H
#define PLIC_BASE 0x0c000000
#define PLIC_CLAIM_COMPLETE 0x0c200004
// Priorities: 4 bytes per IRQ (IRQ 0 is reserved/null)
#define PLIC_PRIORITY(irq) ((volatile uint32_t *)(PLIC_BASE + (irq) * 4))
// Enables: Each Hart has a 0x80 byte stride for its enable bits
// For Hart 0 Machine Mode: 0x0c002000
#define PLIC_ENABLE(hart) ((volatile uint32_t *)(PLIC_BASE + 0x2000 + (hart) * 0x80))
// Threshold and Claim/Complete: Each Hart has a 0x1000 byte stride
// For Hart 0 Machine Mode: 0x0c200000 and 0x0c200004
#define PLIC_THRESHOLD(hart) ((volatile uint32_t *)(PLIC_BASE + 0x200000 + (hart) * 0x1000))
#define PLIC_CLAIM(hart) ((volatile uint32_t *)(PLIC_BASE + 0x200004 + (hart) * 0x1000))
#define UART_IRQ 10
void plic_init();
#endif