From 9fde748acea83d775e367a64858414b674f05b13 Mon Sep 17 00:00:00 2001
From: Miguel <m.i@gmx.at>
Date: Sat, 8 Sep 2018 17:08:55 +0200
Subject: struggling with pic and lapic and smp...

---
 kernel/vmem.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 57 insertions(+), 2 deletions(-)

(limited to 'kernel/vmem.c')

diff --git a/kernel/vmem.c b/kernel/vmem.c
index 1652a9e..6d34a08 100644
--- a/kernel/vmem.c
+++ b/kernel/vmem.c
@@ -7,6 +7,7 @@
 
 static uint32_t kernel_pages;
 uint32_t fb_addr;
+uint32_t apic_addr;
 
 // TODO : why is the frame not 0xfffff??
 enum PAGE_PTE_FLAGS 
@@ -222,7 +223,7 @@ void vmem_free_dir(pdirectory *dir)
 //  programm pages procreates new programmspace
 //
 //    TODO: FIX
-//   KERNEL SPACE `kernel_pages` first PAGES
+//   KERNEL SPACE `kernel_pages` first 8 PAGES = 32megs
 //   FRAMEBUFER WE GET ON INIT
 //   PROGRAMM SPACE HARDCODED TO 0x8000000+2 pages and 0x8c00000+1 pages
 //   
@@ -244,6 +245,8 @@ pdirectory* vmem_new_space_dir(pdirectory *copy_dir,bool stack_only)
     uint32_t phys_addr=0;
     uint32_t virt_addr=0;
 
+    kernel_pages=8;
+
     // first pages are identity mapped
     for(int j=0;j<kernel_pages;j++)
     {
@@ -346,6 +349,57 @@ pdirectory* vmem_new_space_dir(pdirectory *copy_dir,bool stack_only)
 	virt_addr+=1024*4096;
     }
 
+    // 2 pages for apic ( in case on boundary??)
+    phys_addr=apic_addr;
+    virt_addr=apic_addr;
+
+    for(int j=0;j<2;j++)
+    {
+
+	// this is the table for our page directory. It maps 1024*4096 bytes
+	ptable* table;
+
+	// create new tables on init
+	if(copy_dir==NULL)
+	{
+	    // alloc space for our new table
+	    table = (ptable*) kballoc(1);
+	    if (!table)kpanic("unable to alloc table");
+
+	    //! idenitity mapping
+	    for (int i=0, frame=phys_addr, virt=virt_addr; i<1024; i++, frame+=4096, virt+=4096) 
+	    {
+		//! create a new page
+		pt_entry page=0;
+		pt_entry_add_attrib (&page, I86_PTE_PRESENT);
+		pt_entry_add_attrib (&page, I86_PTE_WRITABLE);
+		pt_entry_add_attrib (&page, I86_PTE_USER);
+		pt_entry_set_frame (&page, frame);
+
+		//! ...and add it to the page table
+		table->m_entries [PAGE_TABLE_INDEX (virt) ] = page;
+	    }
+
+	    pd_entry* entry = &dir->m_entries [PAGE_DIRECTORY_INDEX (virt_addr) ];
+	    *entry=0;
+	    pd_entry_add_attrib (entry, I86_PDE_PRESENT);
+	    pd_entry_add_attrib (entry, I86_PDE_WRITABLE);
+	    pt_entry_add_attrib (entry, I86_PTE_USER);
+	    pd_entry_set_frame (entry, (physical_addr)table);
+
+	}
+
+	// otherwise simply take existing stuff from pdir 0
+	else
+	{
+	    dir->m_entries[PAGE_DIRECTORY_INDEX(virt_addr)]=
+		    copy_dir->m_entries[PAGE_DIRECTORY_INDEX(virt_addr)];
+
+	}
+
+	phys_addr+=1024*4096;
+	virt_addr+=1024*4096;
+    }
     // programm space 
     virt_addr=0x8000000;
     for(int j=0;j<2;j++)
@@ -478,9 +532,10 @@ pdirectory* vmem_new_space_dir(pdirectory *copy_dir,bool stack_only)
     return dir;
 }
 
-pdirectory* vmem_init(uint32_t kernel_blocks, uint32_t frameb_addr)
+pdirectory* vmem_init(uint32_t kernel_blocks, uint32_t frameb_addr, uint32_t apic_ad)
 {
     fb_addr=frameb_addr;
+    apic_addr=apic_ad;
     kernel_pages=kernel_blocks/1024+1;
     return vmem_new_space_dir(NULL,false);
 }
-- 
cgit v1.2.3