Updated pic init

include/myke/cpu/cpuidx.h

@@ -7,74 +7,13 @@
 
 #include <stdbool.h>
 
-typedef struct {
-    bool sse3: 1;
-    bool pclmul: 1;
-    bool dtes64: 1;
-    bool monitor: 1;
-    bool ds_cpl: 1;
-    bool vmx: 1;
-    bool smx: 1;
-    bool est: 1;
-    bool tm2: 1;
-    bool ssse3: 1;
-    bool cid: 1;
-    bool reserved: 1;
-    bool fma: 1;
-    bool cx16: 1;
-    bool etprd: 1;
-    bool pdcm: 1;
-    bool pcide: 1;
-    bool dca: 1;
-    bool sse4_1: 1;
-    bool sse4_2: 1;
-    bool x2APIC: 1;
-    bool movbe: 1;
-    bool popcnt: 1;
-    bool reserved2: 1;
-    bool aes: 1;
-    bool xsave: 1;
-    bool osxsave: 1;
-    bool avx: 1;
-} cpu_features_ecx;
+enum {
+    CPUID_VENDOR_ID = 0x00,
+    CPUID_FEATURE_FLAGS = 0x01,
+    CPUID_CACHE
+};
 
-typedef struct {
-    bool fpu: 1;
-    bool vme: 1;
-    bool de: 1;
-    bool pse: 1;
-    bool tsc: 1;
-    bool msr: 1;
-    bool pae: 1;
-    bool mce: 1;
-    bool cx8: 1;
-    bool apic: 1;
-    bool reserved: 1;
-    bool sep: 1;
-    bool mtrr: 1;
-    bool pge: 1;
-    bool mca: 1;
-    bool cmov: 1;
-    bool pat: 1;
-    bool pse36: 1;
-    bool psn: 1;
-    bool clf: 1;
-    bool reserved2: 1;
-    bool dtes: 1;
-    bool acpi: 1;
-    bool mmx: 1;
-    bool fxsr: 1;
-    bool sse: 1;
-    bool sse2: 1;
-    bool ss: 1;
-    bool htt: 1;
-    bool tm1: 1;
-    bool ia64: 1;
-    bool pbe: 1;
-
-} cpu_features_edx;
-
-enum cpu_features {
+enum {
     CPUID_FEAT_ECX_SSE3 = 1 << 0,
     CPUID_FEAT_ECX_PCLMUL = 1 << 1,
     CPUID_FEAT_ECX_DTES64 = 1 << 2,
@@ -134,6 +73,8 @@ enum cpu_features {
     CPUID_FEAT_EDX_PBE = 1 << 31
 };
 
+static bool has_apic();
+
 void cpuidx_print_info();
 
 #endif //NEW_KERNEL_CPUIDX_H

include/myke/cpu/pic.h

@@ -0,0 +1,14 @@
+//
+// Created by rick on 22-08-21.
+//
+
+#ifndef NEW_KERNEL_PIC_H
+#define NEW_KERNEL_PIC_H
+
+#include <sys/types.h>
+
+void pic_init();
+
+void pic_set_mask(uint16_t mask);
+
+#endif //NEW_KERNEL_PIC_H

kernel/cpu/cpuidx.c

@@ -16,18 +16,16 @@ union cpu_name {
     };
 };
 
+static bool has_apic() {
+    uint32_t eax, unused, edx;
+    __get_cpuid(CPUID_FEATURE_FLAGS, &eax, &unused, &unused, &edx);
+    return edx & CPUID_FEAT_EDX_APIC;
+}
+
 
 void cpuidx_print_info() {
     union cpu_name name;
-    __get_cpuid(0, NULL, &name.parts[0], &name.parts[2], &name.parts[1]);
+    __get_cpuid(CPUID_VENDOR_ID, NULL, &name.parts[0], &name.parts[2], &name.parts[1]);
     name.end = 0;
     printf("CPU: %s\n", &name.name);
-
-    cpu_features_ecx features_ecx;
-    cpu_features_edx features_edx;
-    __get_cpuid(1, NULL, NULL, (uint32_t *) &features_ecx, (uint32_t *) &features_edx);
-
-    printf("");
-
-
 }

kernel/cpu/isr.c

@@ -7,6 +7,7 @@
 #include <myke/cpu/isr.h>
 #include <myke/debug/debug.h>
 #include <myke/cpu/idt.h>
+#include <myke/cpu/pic.h>
 #include <myke/cpu/syscall_handler.h>
 #include <myke/drivers/ports.h>
 #include <myke/libk/libk.h>
@@ -52,19 +53,10 @@ void isr_install() {
 
     // Remap the PIC
     // todo make readable
-    port_byte_out(0x20, 0x11);
-    port_byte_out(0xA0, 0x11);
-    port_byte_out(0x21, 0x20);
-    port_byte_out(0xA1, 0x28);
-    port_byte_out(0x21, 0x04);
-    port_byte_out(0xA1, 0x02);
-    port_byte_out(0x21, 0x01);
-    port_byte_out(0xA1, 0x01);
-    port_byte_out(0x21, 0x0);
-    port_byte_out(0xA1, 0x0);
+    pic_init();
 
     // Install the IRQs
-    set_idt_gate(32, (uint32_t) irq0);
+    set_idt_gate(32, (uint32_t) irq0); // 0x20
     set_idt_gate(33, (uint32_t) irq1);
     set_idt_gate(34, (uint32_t) irq2);
     set_idt_gate(35, (uint32_t) irq3);
@@ -72,7 +64,7 @@ void isr_install() {
     set_idt_gate(37, (uint32_t) irq5);
     set_idt_gate(38, (uint32_t) irq6);
     set_idt_gate(39, (uint32_t) irq7);
-    set_idt_gate(40, (uint32_t) irq8);
+    set_idt_gate(40, (uint32_t) irq8); // 0x28
     set_idt_gate(41, (uint32_t) irq9);
     set_idt_gate(42, (uint32_t) irq10);
     set_idt_gate(43, (uint32_t) irq11);

kernel/cpu/pic.c

@@ -0,0 +1,43 @@
+//
+// Created by rick on 22-08-21.
+//
+#include <myke/cpu/pic.h>
+#include <myke/drivers/ports.h>
+
+// https://wiki.osdev.org/8259_PIC
+#define ICW1_ICW4       0x01        /* ICW4 (not) needed */
+#define ICW1_SINGLE     0x02        /* Single (cascade) mode */
+#define ICW1_INTERVAL4  0x04        /* Call address interval 4 (8) */
+#define ICW1_LEVEL      0x08        /* Level triggered (edge) mode */
+#define ICW1_INIT       0x10        /* Initialization - required! */
+
+#define ICW4_8086       0x01        /* 8086/88 (MCS-80/85) mode */
+#define ICW4_AUTO       0x02        /* Auto (normal) EOI */
+#define ICW4_BUF_SLAVE  0x08        /* Buffered mode/slave */
+#define ICW4_BUF_MASTER 0x0C        /* Buffered mode/master */
+#define ICW4_SFNM       0x10        /* Special fully nested (not) */
+
+void pic_init() {
+    // init both master and slave pic's
+    port_byte_out(PORT_PIC_MASTER_COMMAND, ICW1_INIT | ICW1_ICW4);
+    port_byte_out(PORT_PIC_SLAVE_COMMAND, ICW1_INIT | ICW1_ICW4);
+
+    // master with ICW4 offset 20, Slave on IRQ2, 8086 mode,
+    // ICW2
+    port_byte_out(PORT_PIC_MASTER_DATA, 0x20); // offset master
+    port_byte_out(PORT_PIC_SLAVE_DATA, 0x28); // offset slave
+    // ICW3
+    port_byte_out(PORT_PIC_MASTER_DATA, 0x04); // slave PIC at IRQ2
+    port_byte_out(PORT_PIC_SLAVE_DATA, 0x02); // cascade identity
+    // ICW4
+    port_byte_out(PORT_PIC_MASTER_DATA, ICW4_8086); // 8086 mode
+    port_byte_out(PORT_PIC_SLAVE_DATA, ICW4_8086);
+
+    // empty mask
+    pic_set_mask(0);
+}
+
+void pic_set_mask(uint16_t mask) {
+    port_byte_out(PORT_PIC_MASTER_DATA, mask & 0xFF);
+    port_byte_out(PORT_PIC_SLAVE_DATA, mask << 8);
+}