From d7c12c5210ed1545549b9d2b14fb9fb89ce652e2 Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Wed, 13 May 2015 01:18:53 +0200
Subject: implementing multiboot spec stuff

---
 kernel/kernel.c | 93 ++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 72 insertions(+), 21 deletions(-)

(limited to 'kernel/kernel.c')

diff --git a/kernel/kernel.c b/kernel/kernel.c
index 8bd60ca..d0f1bce 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -13,6 +13,7 @@
 #include "mem.h"
 #include "vmem.h"
 #include "interrupts.h"
+#include "multiboot.h"
 
 #include "console.h"
 
@@ -23,31 +24,79 @@
 #include "task.h"
 
 
-// mp informs us if this if this is the main processor
-void kernel_main(uint32_t initial_stack, int mp)
+void kernel_main(uint32_t eax,uint32_t ebx)
 {
 
-/*
-    int i=0;
-    while(true)
-    {
-	size_t *terminal_buffer = (uint16_t*) 0xB8000;
-	uint16_t c16='X';
-	i++;
-	if (i%2)c16='_';
-
-	c16 = c16 | 4 << 8;
-	terminal_buffer[2] = c16;
-    }
-    */
+    
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"kernel_main: eax=0x%08X ebx=0x%08X",eax,ebx);
 
-
-    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"initial_stack: 0x%08X",initial_stack);
     //
     // Configuring the PIT timer.
     //
+    
     timer_init();
 
+    // 
+    // Process Multiboot Header
+    //
+    
+    if(eax!=0x2badb002)panic(FOOLOS_MODULE_NAME,"EAX was not set properly by your bootlaoder!");
+
+    multiboot_information *info;
+    info=ebx;
+    if(info->flags&&1<<9)
+    {
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Loaded by: \"%s\"",info->boot_loader_name);
+    }
+    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"multiboot flags: 0x%08X",info->flags);
+
+    if(info->flags&&1<<0)
+    {
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mem_lower: %d KB",info->mem_lower);
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mem_upper: %d KB",info->mem_upper);
+    }
+
+    if(info->flags&&1<<2)
+    {
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"cmdline: \"%s\"",info->cmdline);
+    }
+
+    if(info->flags&&1<<3)
+    {
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d modules loaded",info->mods_count);
+
+	multiboot_mod *mod=info->mods_addr;
+
+	for(int i=0;i<info->mods_count;i++)
+	{
+	    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"mod at 0x08%X-0x08%X : %s", 
+		    mod->mod_start,mod->mod_end, mod->string);
+	    mod++;
+	}
+    }
+
+    if(info->flags&&1<<6)
+    {
+	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"memory map of length %d provided by bootloader",info->mmap_length);
+
+	uint32_t mmap_addr=info->mmap_addr;
+
+	while(mmap_addr<info->mmap_addr+info->mmap_length)
+	{
+	    multiboot_mmap *mmap=mmap_addr;
+	    uint32_t mem_start=mmap->base_addr;
+	    uint32_t mem_end=mmap->base_addr+mmap->length;
+
+	    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%08X - %08X / type: %d, size: %d",
+		    mem_start, mem_end, mmap->type, mmap->size);
+
+	    mmap_addr+=mmap->size+4;
+	}
+
+	
+    }
+    else panic(FOOLOS_MODULE_NAME,"Unable to continue without memory map, sorry!");
+
     //
     //	Memory Init
     //
@@ -57,22 +106,24 @@ void kernel_main(uint32_t initial_stack, int mp)
     //	we know that here, the bootloader placed the memory map and
     //	the number of entries.
     //
-    mem_init((physical_address)0xa001,(int)(*((uint16_t *)(0xa000))));
+//    mem_init((physical_address)0xa001,(int)(*((uint16_t *)(0xa000))));
+    
 
     //
     // init output to screen
     // 
     uint32_t physbase=console_init();
 
+
     //
     // Activate Virtual Memory (paging)
-    pdirectory *dir=vmem_init(physbase);
+//    pdirectory *dir=vmem_init(physbase);
 
 
     // log buffered messages to console
     log_log();
 
-    //while(1);
+    while(1);
 
     //
     // Setup Interrupts (code segment: 0x08)
@@ -110,7 +161,7 @@ void kernel_main(uint32_t initial_stack, int mp)
     //
     // Initialize Multitasking
     //
-    task_init(dir); //; this will never return!
+    //task_init(dir); //; this will never return!
  
 }
 
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