diff options
| author | Carlos Maiolino <[email protected]> | 2025-08-01 21:03:16 +0200 |
|---|---|---|
| committer | Carlos Maiolino <[email protected]> | 2025-08-01 21:03:16 +0200 |
| commit | 2725b95a1f78d2feac553d37252f2e560c2f9aac (patch) | |
| tree | 3e68aaf21c25fc2a46e3ee29fb4f23b188e3b3a4 /src/idt/idt.c | |
| parent | 57d8e2b236c7a185bdd941c247ef0dcc5961a24e (diff) | |
Setup interrupt handling
Remap master PIC to IOAddress 0x20 to avoid collisions with CPU
exceptions.
Setup a default interrupt handler and map all interrupts to this handler
by default.
Setup a Keyboard interrupt handler for testing purposes
Wire everything up in the Makefile
Signed-off-by: Carlos Maiolino <[email protected]>
Diffstat (limited to 'src/idt/idt.c')
| -rw-r--r-- | src/idt/idt.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/idt/idt.c b/src/idt/idt.c index d7a6743..a83c612 100644 --- a/src/idt/idt.c +++ b/src/idt/idt.c @@ -3,11 +3,28 @@ #include <toxic/string.h> #include <toxic/vga.h> #include <toxic/idt.h> +#include <toxic/io.h> struct int_descriptor int_table[TOTAL_INTERRUPTS]; struct int_reg_descriptor idtr_descriptor; extern void idt_load(struct int_reg_descriptor *desc); +extern void int21h(); +extern void default_handler(); + +void +int21h_handler(void) +{ + vprintl("Keyboard pressed\n"); + outb(0x20, 0x20); +} + +void +default_int_handler(void) +{ + /* Ack the Interrupt */ + outb(0x20, 0x20); +} static void idt_zero() @@ -30,12 +47,18 @@ idt_set(int int_num, void *addr) void interrupts_init(void) { + int i; + memset(int_table, 0, sizeof(int_table)); idtr_descriptor.limit = sizeof(int_table) - 1; idtr_descriptor.base = (uint32_t) int_table; + for (i = 0; i < TOTAL_INTERRUPTS; i++) + idt_set(i, default_handler); + idt_set(0, idt_zero); + idt_set(0x21, int21h); idt_load(&idtr_descriptor); } |