feat/kernel: I dont remember but i did stuff regarding SMP

kernel/GNUmakefile

@@ -51,6 +51,7 @@ else
 endif
 
 CPPFLAGS := -I../external -I$(SRCDIR) -MMD -MP -DLIMINE_API_REVISION=3
+CFLAGS +=  -std=c99
 
 IMPLICIT_SRCS :=
 ifneq ($(MAKECMDGOALS),menuconfig)

kernel/src/arch/cpu.h

@@ -21,13 +21,13 @@ static inline void wrmsr(uint64_t msr, uint64_t value)
 {
     uint32_t low = value & 0xFFFFFFFF;
     uint32_t high = value >> 32;
-    asm volatile("wrmsr" : : "c"(msr), "a"(low), "d"(high));
+    __asm__ volatile("wrmsr" : : "c"(msr), "a"(low), "d"(high));
 }
 
 static inline uint64_t rdmsr(uint64_t msr)
 {
     uint32_t low, high;
-    asm volatile("rdmsr" : "=a"(low), "=d"(high) : "c"(msr));
+    __asm__ volatile("rdmsr" : "=a"(low), "=d"(high) : "c"(msr));
     return ((uint64_t)high << 32) | low;
 }
 

kernel/src/arch/smp.c

@@ -49,6 +49,9 @@ void smp_entry(struct limine_mp_info *smp_info)
     set_cpu_local(cpu);
     atomic_fetch_add(&started_cpus, 1);
 
+    log_early("CPU %d is up", cpu->cpu_index);
+
+    cpu->ready = true;
     while (1)
         __asm__ volatile("hlt");
 }
@@ -67,21 +70,37 @@ void smp_init(void)
         memset(&cpu_locals[i], 0, sizeof(cpu_local_t));
         cpu_locals[i].lapic_id = info->lapic_id;
         cpu_locals[i].cpu_index = i;
+        cpu_locals[i].ready = false;
 
         if (info->lapic_id == bootstrap_lapic_id)
         {
             set_cpu_local(&cpu_locals[i]);
-            log_early("CPU %u (LAPIC %u) is the bootstrap processor", i, info->lapic_id);
+            log_early("CPU %u is the bootstrap processor", i);
             atomic_fetch_add(&started_cpus, 1);
+            cpu_locals[i].ready = true;
         }
         else
         {
-            atomic_store((_Atomic(void **))&info->goto_address, smp_entry);
+            __atomic_store_n(&info->goto_address, smp_entry, __ATOMIC_SEQ_CST);
             while (atomic_load(&started_cpus) < (i + 1))
                 __asm__ volatile("pause");
         }
     }
 
-    while (atomic_load(&started_cpus) < cpu_count)
-        __asm__ volatile("pause");
+    bool all_ready = false;
+    while (!all_ready)
+    {
+        all_ready = true;
+        for (uint32_t i = 0; i < cpu_count; i++)
+        {
+            if (!cpu_locals[i].ready)
+            {
+                all_ready = false;
+                __asm__ volatile("pause");
+                break;
+            }
+        }
+    }
+
+    log_early("All CPUs are ready");
 }

kernel/src/arch/smp.h

@@ -3,6 +3,7 @@
 #define SMP_H
 
 #include <stdint.h>
+#include <stdbool.h>
 
 extern uint32_t bootstrap_lapic_id;
 
@@ -10,6 +11,7 @@ typedef struct
 {
     uint32_t lapic_id;
     uint32_t cpu_index;
+    bool ready;
 } cpu_local_t;
 
 void smp_init();

kernel/src/boot/emk.h

@@ -35,4 +35,6 @@ extern struct limine_mp_response *mp_response;
 extern struct flanterm_context *ft_ctx;
 #endif // FLANTERM_SUPPORT
 
+#define LOG_SEPARATOR "----------------------------------------"
+
 #endif // EMK_H

kernel/src/emk.c

@@ -86,6 +86,7 @@ void emk_entry(void)
 
     log_early("Experimental Micro Kernel (EMK) 1.0 Copytright (c) 2025 Piraterna");
     log_early("Compiled at %s %s, emk1.0-%s, flanterm support: %s", __TIME__, __DATE__, BUILD_MODE, FLANTERM_SUPPORT ? "yes" : "no");
+    log_early("%s", LOG_SEPARATOR);
 
     if (!LIMINE_BASE_REVISION_SUPPORTED)
     {
@@ -94,9 +95,16 @@ void emk_entry(void)
     }
 
     gdt_init();
-    log_early("Initialized GDT");
     idt_init();
-    log_early("Initialized IDT");
+
+    /* Setup SMP */
+    if (!mp_request.response)
+    {
+        kpanic(NULL, "Failed to get MP request");
+    }
+
+    mp_response = mp_request.response;
+    smp_init();
 
     /* Setup physical memory*/
     if (!hhdm_request.response)
@@ -111,7 +119,6 @@ void emk_entry(void)
 
     memmap = memmap_request.response;
     hhdm_offset = hhdm_request.response->offset;
-    log_early("HHDM Offset: %llx", hhdm_offset);
     pmm_init();
 
     /* Test allocate a single physical page */
@@ -120,9 +127,7 @@ void emk_entry(void)
         kpanic(NULL, "Failed to allocate single physical page");
 
     *a = 32;
-    log_early("Allocated 1 physical page @ %llx", (uint64_t)a);
     pfree(a, 1);
-    log_early("Initialized physical page manager");
 
     /* Setup virtual memory */
     if (!kernel_address_request.response)
@@ -133,7 +138,6 @@ void emk_entry(void)
     kvirt = kernel_address_request.response->virtual_base;
     kphys = kernel_address_request.response->physical_base;
     paging_init();
-    log_early("Initialized paging");
 
     /* Kernel Virtual Memory Context, not to be confused with KVM */
     kvm_ctx = vinit(kernel_pagemap, 0x1000);
@@ -149,9 +153,7 @@ void emk_entry(void)
     }
 
     *b = 32;
-    log_early("Allocated 1 virtual page @ %llx", (uint64_t)b);
     vfree(kvm_ctx, b);
-    log_early("Initialized virtual page manager");
 
     /* Setup kernel heap */
     heap_init();
@@ -162,21 +164,12 @@ void emk_entry(void)
     }
 
     *c = 32;
-    log_early("Allocated 1 byte @ %llx", (uint64_t)c);
     kfree(c);
-    log_early("Initialized kernel heap");
 
-    /* Setup SMP */
-    if (!mp_request.response)
-    {
-        kpanic(NULL, "Failed to get MP request");
-    }
-
-    mp_response = mp_request.response;
-    smp_init();
-    log_early("Initialized SMP");
-
-    __asm__ volatile("int $0x01");
+    /* Finished */
+    log_early("%s", LOG_SEPARATOR);
+    uint32_t uptime = 0;
+    log_early("Finished initializing EMK v1.0, took %d seconds", uptime); /* Still not usermode, so keep using log_early */
 
     hlt();
 }

kernel/src/sys/spinlock.h

@@ -19,7 +19,7 @@ static inline void spinlock_acquire(spinlock_t *lock)
 {
     while (__atomic_test_and_set(&lock->lock, __ATOMIC_ACQUIRE))
     {
-        asm volatile("pause" ::: "memory");
+        __asm__ volatile("pause" ::: "memory");
     }
 }