X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/9343e9338ddf1015a63a95e4e78bfe659a557b76..33e49b2e6d599bc56326841b5b373b9f76adc5f7:/aseg-paging/pagingstub.c

diff --git a/aseg-paging/pagingstub.c b/aseg-paging/pagingstub.c
deleted file mode 100644
index 7d430b9..0000000
--- a/aseg-paging/pagingstub.c
+++ /dev/null
@@ -1,199 +0,0 @@
-#include <io.h>
-#include <smram.h>
-#include <video_defines.h>
-#include <minilib.h>
-#include <smi.h>
-#include <pci-bother.h>
-#include <serial.h>
-#include <output.h>
-#include "traps.h"
-#include "../net/net.h"
-#include "vga-overlay.h"
-
-extern void smi_init();
-#include "vm_flags.h"
-
-extern void smi_entry();
-void set_cr0(unsigned int);
-void ps_switch_stack (void (*call)(), int stack);
-
-#define get_cr0() \
-    ({ \
-        register unsigned int _temp__; \
-        asm volatile("mov %%cr0, %0" : "=r" (_temp__)); \
-        _temp__; \
-    })
-
-
-#define set_cr3(value) \
-    { \
-        register unsigned int _temp__ = (value); \
-        asm volatile("mov %0, %%cr3" : : "r" (_temp__)); \
-     }
-#define	CR0_PG	0x80000000
-
-#define MAP_FLAGS	(PTE_PRESENT | PTE_READ_WRITE)
-
-static int initialized = 0;
-static int paging_enb = 0;
-static unsigned long *pd;
-
-extern int _bss, _bssend, _end;
-
-static unsigned long curmapped = 0xFFFFFFFF;
-
-unsigned long v2p(void *virt)
-{
-	unsigned long _virt = (unsigned long)virt;
-	
-	if (!paging_enb)
-		return _virt;
-	
-	if (_virt >= 0xA0000 && _virt < 0xC0000)
-		return _virt;
-	if (_virt >= 0x200000 && _virt < 0x300000)
-		return _virt - 0x200000 + /* XXX */ 0x1FF82000;
-	if (_virt >= 0x1F0000 && _virt < 0x1F2000)
-		return _virt - 0x1F0000 + 0x1FF80000;
-	if ((_virt & ~0xFFF) == 0x4000)
-		return _virt - 0x4000 + curmapped;
-	
-	outputf("WARNING: v2p(%08x)", _virt);
-	return 0xFFFFFFFF;
-}
-
-void *p2v(unsigned long phys)
-{
-	if (!paging_enb)
-		return (void*)phys;
-	
-	if (phys >= 0xA0000 && phys < 0xC0000)
-		return (void*)phys;
-	if (phys >= 0x1FF82000 && phys < 0x20000000)
-		return (void*)(phys - 0x1FF82000 + 0x200000);
-	if (phys >= 0x1FF80000 && phys < 0x1FF82000)
-		return (void*)(phys - 0x1FF80000 + 0x1F0000);
-		
-	if ((phys & ~0xFFF) != curmapped)	/* If it's not mapped, map it in. */
-	{
-		curmapped = phys & ~0xFFF;
-		addmap(0x4000, curmapped);
-		asm volatile("invlpg 0x4000");
-	}
-	return (void*)(0x4000 + (phys & 0xFFF));
-}
-
-int addmap(unsigned long vaddr, unsigned long paddr)
-{
-	unsigned long pde = ((unsigned long *)p2v((unsigned long)pd))[PDE_FOR(vaddr)];
-	unsigned long *pt;
-	
-	if (!(pde & PTE_PRESENT))
-		return -1;
-	
-	pt = (unsigned long *)p2v(ADDR_12_MASK(pde));
-	pt[PTE_FOR(vaddr)] = paddr | PTE_PRESENT | PTE_READ_WRITE;
-	
-	return 0;
-}
-
-void *demap(unsigned long client_pd, unsigned long vaddr)
-{
-	unsigned long pde = ((unsigned long *)p2v(client_pd))[PDE_FOR(vaddr)];
-	unsigned long pte;
-	
-	if (!(pde & PTE_PRESENT))
-		return (void*)0x0;
-	pte = ((unsigned long *)p2v(ADDR_12_MASK(pde)))[PTE_FOR(vaddr)];
-	if (!(pte & PTE_PRESENT))
-		return (void*)0x0;
-	return p2v((pte & ~0xFFF) + (vaddr & 0xFFF));
-}
-
-static void pt_setup(int tseg_start, int tseg_size) {
-	int i;
-
-	/* The page directory and page table live at TSEG and TSEG + 0x1000,
-	 * respectively. */
-	unsigned long *pagedirectory = (unsigned long *) tseg_start;
-	unsigned long *pagetable = (unsigned long *) (tseg_start + 0x1000);
-	
-	pd = pagedirectory;
-
-	/* Clear out the page directory except for one entry pointing to the
-	 * page table, and clear the page table entirely. */
-	pagedirectory[0] = (tseg_start + 0x1000) | PTE_PRESENT | PTE_READ_WRITE;
-	for (i = 1; i < 1024; i++)
-		pagedirectory[i] = 0;
-
-	for (i = 0; i < 1024; i++)
-		pagetable[i] = 0;
-
-	/* Map 0x0A0000:0x0BFFFF to itself. */
-	for (i = 0; i < 32; i++)
-		addmap(0xA0000 + i * 0x1000, 0xA0000 + i * 0x1000);
-
-	/* Map 0x200000:0x300000 to TSEG data */
-	for (i = 0; i < 256; i++)
-		addmap(0x200000 + i * 0x1000, tseg_start + (i + 2) * 0x1000);
-
-	/* Map 0x300000:0x400000 to 0x200000, so we can copy our code out of
-	 * RAM the first time around */
-	for (i = 0; i < 256; i++)
-		addmap(0x300000 + i * 0x1000, 0x200000 + i * 0x1000);
-
-	/* Map 0x1F0000:0x1F2000 to TSEG paging info */
-	for (i = 0; i < 2; i++)
-		addmap(0x1F0000 + i * 0x1000, tseg_start + i * 0x1000);
-}
-
-void c_entry(void)
-{
-	paging_enb = 0;
-
-	outb(0x80, 0x01);	
-	if (!initialized)
-		pt_setup(0x1FF80000, 0x80000);
-	outb(0x80, 0x02);
-		
-	/* Enable paging. */
-	set_cr3((unsigned long)pd);
-	set_cr0(get_cr0() | CR0_PG);
-	outb(0x80, 0x03);
-	paging_enb = 1;
-
-	/* If this is the first goround, copy in data. */
-	if (!initialized)
-	{
-		unsigned char *p;
-		
-		outb(0x80, 0x04);
-		for (p = (void *)0x200000; (void *)p < (void *)&_bss; p++)
-			*p = *(p + 0x100000);
-		for (p = (void *)&_bss; (void *)p < (void *)&_bssend; p++)
-			*p = 0;
-		outb(0x80, 0x05);
-		
-		/* Only now is it safe to call other functions. */
-		serial_init();
-		dolog("Evacuation to TSEG complete.");
-	}
-	
-	outb(0x80, 0x06);
-
-	traps_install();
-	
-	outb(0x80, 0x07);
-
-	if (!initialized)
-	{
-		smi_init();	/* Run the firstrun. */
-		outb(0x80, 0x08);
-		
-		initialized = 1;
-	}
-	
-	outb(0x80, 0x09);
-	ps_switch_stack(smi_entry, 0x270000);
-	outb(0x80, 0xFA);
-}