From 1e4a254674f668839e5de273916024c16814b045 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji6283@gmail.com>
Date: Sun, 13 Sep 2020 03:19:57 -0400
Subject: (basic, not much tested) keyboard, better panic

---
 src/kernel/idt.c | 55 +++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 37 insertions(+), 18 deletions(-)

(limited to 'src/kernel/idt.c')

diff --git a/src/kernel/idt.c b/src/kernel/idt.c
index 3d23797..4dc8a36 100644
--- a/src/kernel/idt.c
+++ b/src/kernel/idt.c
@@ -7,12 +7,11 @@
 #include "task.h"
 #include "paging.h"
 #include "pmap.h"
+#include "kbd.h"
 
 enum {
   IDT_PRESENT = 0x80,
-
   IDT_INT     = 0x0e,
-  IDT_TRAP    = 0x0f
 };
 
 struct idt_entry {
@@ -55,21 +54,13 @@ static uint32_t sc_file_read(uint32_t handle, uint32_t file_offset, uint32_t cou
   return count;
 }
 
-static bool sc_start_task(uint32_t drive_number, char *path) {
+static bool sc_start_task(uint32_t drive_number, char *path, const char *pass) {
   switch_to_kernel_cr3();
-  bool result = try_elf_run(drives + drive_number, path);
+  bool result = try_elf_run(drives + drive_number, vma_to_pma(active_task->page_directory, path), pass);
   switch_to_task_cr3();
   return result;
 }
 
-static void sc_log_string(char *sz) {
-  logsz(sz);
-}
-
-static char sc_get_key() {
-  panic("TODO: get key system call");
-}
-
 static void *sc_allocate_ram(uint32_t pages) {
   return pd_user_allocate_anywhere_writable(active_task->page_directory, pages);
 }
@@ -94,7 +85,7 @@ static uint32_t sc_memory_info(enum mi_arg arg) {
   case MI_USER_LEFT:
     return user_pages_left;
   case MI_TASK_LEFT:
-    panic("TODO: this process memory left");
+    PANIC("TODO: memory info task left");
   default:
     return -1;
   }
@@ -106,18 +97,21 @@ void const *syscall_table[] = {
   &sc_file_read,
   &sc_file_get_size,
   &sc_start_task,
-  &sc_log_string,
-  &sc_get_key,
+  &logsz,
+  &get_key_code,
   &sc_allocate_ram,
   &sc_memory_info
 };
 
-typedef void isr_t;
+//these aren't really void (*)()'s, but gcc complains if we take an address of a void, so we give it a type
+typedef void (*isr_t)();
 
 extern isr_t syscall_isr;
 extern isr_t quit_isr;
 extern isr_t yield_isr;
 
+extern isr_t kbd_isr;
+
 static void register_int(uint8_t n, isr_t *isr, uint8_t dpl) {
   idt[n].addr_low = (uint32_t)isr & 0xffff;
   idt[n].addr_high = (uint32_t)isr >> 16;
@@ -125,6 +119,17 @@ static void register_int(uint8_t n, isr_t *isr, uint8_t dpl) {
   idt[n].flags = IDT_PRESENT | (dpl << 5) | IDT_INT;
 }
 
+enum {
+  PIC_MCMD  = 0x0020,
+  PIC_MDATA = 0x0021,
+  PIC_SCMD  = 0x00a0,
+  PIC_SDATA = 0x00a1
+};
+
+enum {
+  PIC_RESET = 0x11
+};
+
 void init_idt() {
   for (uint16_t i = 0; i < 256; ++i) {
     idt[i].flags = 0;
@@ -135,8 +140,22 @@ void init_idt() {
   register_int(0x38, &quit_isr, 3);
   register_int(0x39, &yield_isr, 3);
 
-  outb(0x0021, 0xff);
-  outb(0x00a1, 0xff);
+  register_int(0x21, &kbd_isr, 0);
+
+  outb(PIC_MCMD, PIC_RESET);
+  outb(PIC_SCMD, PIC_RESET);
+
+  outb(PIC_MDATA, 0x20);
+  outb(PIC_SDATA, 0x28);
+
+  outb(PIC_MDATA, 0x04);
+  outb(PIC_SDATA, 0x02);
+
+  outb(PIC_MDATA, 0x01);
+  outb(PIC_SDATA, 0x01);
+
+  outb(PIC_MDATA, 0xfd);
+  outb(PIC_SDATA, 0xff);
 
   asm volatile (
     "lidt %0"
-- 
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