This is an incremental patch that allows me to boot:
--- 2.3.99-pre3aa1-alpha/arch/alpha/kernel/head.S.~1~ Wed Mar 29 18:02:32 2000
+++ 2.3.99-pre3aa1-alpha/arch/alpha/kernel/head.S Wed Mar 29 18:14:12 2000
@@ -10,8 +10,11 @@
#include <linux/config.h>
#include <asm/pal.h>
+.globl swapper_pg_dir
+.globl _stext
+swapper_pg_dir=SWAPPER_PGD
+
.set noreorder
- .globl _stext
.globl __start
.ent __start
_stext:
--- 2.3.99-pre3aa1-alpha/arch/alpha/kernel/process.c.~1~ Wed Mar 29 18:01:58
2000
+++ 2.3.99-pre3aa1-alpha/arch/alpha/kernel/process.c Wed Mar 29 18:07:03 2000
@@ -59,7 +59,6 @@
= { task: INIT_TASK(init_task_union.task) };
pgd_t swapper_pg_dir[1024] __attribute__((aligned(PAGE_SIZE)));
-char ___zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
/*
* No need to acquire the kernel lock, we're entirely local..
--- 2.3.99-pre3aa1-alpha/arch/alpha/kernel/setup.c.~1~ Wed Mar 29 18:01:58 2000
+++ 2.3.99-pre3aa1-alpha/arch/alpha/kernel/setup.c Wed Mar 29 18:34:06 2000
@@ -72,7 +72,7 @@
* initialized, we need to copy things out into a more permanent
* place.
*/
-#define PARAM (IDENT_ADDR + 0x30A000)
+#define PARAM ZERO_PGE
#define COMMAND_LINE ((char*)(PARAM + 0x0000))
#define COMMAND_LINE_SIZE 256
#define INITRD_START (*(unsigned long *) (PARAM+0x100))
@@ -235,7 +235,11 @@
}
/* Find the bounds of kernel memory. */
- start_kernel_pfn = PFN_UP(virt_to_phys(_stext));
+#if 0
+ start_kernel_pfn = PFN_DOWN(virt_to_phys(_stext));
+#else
+ start_kernel_pfn = 0;
+#endif
end_kernel_pfn = PFN_UP(virt_to_phys(_end));
bootmap_start = -1;
--- 2.3.99-pre3aa1-alpha/arch/alpha/mm/init.c.~1~ Wed Mar 29 18:01:58 2000
+++ 2.3.99-pre3aa1-alpha/arch/alpha/mm/init.c Wed Mar 29 18:25:31 2000
@@ -57,7 +57,7 @@
inline pmd_t *
__bad_pagetable(void)
{
- return (pmd_t *) ___zero_page;
+ return (pmd_t *) EMPTY_PGT;
}
inline pte_t
@@ -216,7 +216,7 @@
/* Initialize the kernel's page tables. Linux puts the vptb in
the last slot of the L1 page table. */
- clear_page(___zero_page);
+ clear_page((void *)ZERO_PGE);
clear_page(swapper_pg_dir);
newptbr = ((unsigned long) swapper_pg_dir - PAGE_OFFSET) >> PAGE_SHIFT;
pgd_val(swapper_pg_dir[1023]) =
--- 2.3.99-pre3aa1-alpha/include/asm-alpha/pgtable.h.~1~ Wed Mar 29 18:01:58
2000
+++ 2.3.99-pre3aa1-alpha/include/asm-alpha/pgtable.h Wed Mar 29 18:16:18 2000
@@ -136,12 +136,11 @@
extern pte_t __bad_page(void);
extern pmd_t * __bad_pagetable(void);
-extern char ___zero_page[];
extern unsigned long __zero_page(void);
#define BAD_PAGETABLE __bad_pagetable()
#define BAD_PAGE __bad_page()
-#define ZERO_PAGE(vaddr) (mem_map + MAP_NR(___zero_page))
+#define ZERO_PAGE(vaddr) (mem_map + MAP_NR(ZERO_PGE))
/* number of bits that fit into a memory pointer */
#define BITS_PER_PTR (8*sizeof(unsigned long))
--- 2.3.99-pre3aa1-alpha/include/asm-alpha/system.h.~1~ Wed Mar 29 18:01:58 2000
+++ 2.3.99-pre3aa1-alpha/include/asm-alpha/system.h Wed Mar 29 18:16:18 2000
@@ -10,6 +10,27 @@
* files, so it does only defines, not any C code.
*/
+/*
+ * We leave one page for the initial stack page, and one page for
+ * the initial process structure. Also, the console eats 3 MB for
+ * the initial bootloader (one of which we can reclaim later).
+ * With a few other pages for various reasons, we'll use an initial
+ * load address of PAGE_OFFSET+0x310000UL
+ */
+#define BOOT_PCB 0x20000000
+#define BOOT_ADDR 0x20000000
+/* Remove when official MILO sources have ELF support: */
+#define BOOT_SIZE (16*1024)
+
+#define KERNEL_START (PAGE_OFFSET+0x300000)
+#define SWAPPER_PGD (PAGE_OFFSET+0x300000)
+#define INIT_STACK (PAGE_OFFSET+0x302000)
+#define EMPTY_PGT (PAGE_OFFSET+0x304000)
+#define EMPTY_PGE (PAGE_OFFSET+0x308000)
+#define ZERO_PGE (PAGE_OFFSET+0x30A000)
+
+#define START_ADDR (PAGE_OFFSET+0x310000)
+
#ifndef __ASSEMBLY__
/*
And yes if I change the #if 0 below to #if 1 the kernel crashes in the
early boot stage. I still don't know what's going wrong...
+#if 0
+ start_kernel_pfn = PFN_DOWN(virt_to_phys(_stext));
+#else
+ start_kernel_pfn = 0;
+#endif
Andrea
