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#include <linux/linkage.h>

#include <asm/page.h>
#include <asm/contregs.h>
#include <asm/sun3-head.h>

PSL_HIGHIPL     = 0x2700
NBSG            = 0x20000
ICACHE_ONLY     = 0x00000009
CACHES_OFF      = 0x00000008    | actually a clear and disable --m
#define MAS_STACK INT_STACK 
ROOT_TABLE_SIZE = 128
PAGESIZE        = 8192
SUN3_INVALID_PMEG = 255
.globl SYMBOL_NAME(bootup_user_stack)
.globl SYMBOL_NAME(bootup_kernel_stack)
.globl SYMBOL_NAME(pg0)
.globl SYMBOL_NAME(swapper_pg_dir)
.globl SYMBOL_NAME(kernel_pmd_table)
.globl SYMBOL_NAME(availmem)
.global SYMBOL_NAME(m68k_pgtable_cachemode)
.global SYMBOL_NAME(kpt)
| todo: all these should be in bss!
SYMBOL_NAME(swapper_pg_dir):                .skip 0x2000
SYMBOL_NAME(pg0):                           .skip 0x2000
SYMBOL_NAME(kernel_pmd_table):              .skip 0x2000

.globl SYMBOL_NAME(kernel_pg_dir)
.equ    SYMBOL_NAME(kernel_pg_dir),SYMBOL_NAME(kernel_pmd_table)

        .section .head
ENTRY(_stext)
ENTRY(_start)

/* Firstly, disable interrupts and set up function codes. */
        movew   #PSL_HIGHIPL, %sr
        moveq   #FC_CONTROL, %d0        
        movec   %d0, %sfc       
        movec   %d0, %dfc       

/* Make sure we're in context zero. */
        moveq   #0, %d0
        movsb   %d0, AC_CONTEXT

/* map everything the bootloader left us into high memory, clean up the
   excess later */
        lea     (AC_SEGMAP+0),%a0 
        lea     (AC_SEGMAP+KERNBASE),%a1        
1:      
        movsb   %a0@, %d1
        movsb   %d1, %a1@
        cmpib   #SUN3_INVALID_PMEG, %d1
        beq     2f
        addl    #NBSG,%a0
        addl    #NBSG,%a1
        jmp     1b
        
2:                              
        
/* Disable caches and jump to high code. */
        moveq   #ICACHE_ONLY,%d0        | Cache disabled until we're ready to enable it
        movc    %d0, %cacr      |   is this the right value? (yes --m)
        jmp     1f:l            

/* Following code executes at high addresses (0xE000xxx). */
1:      lea     SYMBOL_NAME(init_task_union),%a2        | get initial thread...
        lea     %a2@(KTHREAD_SIZE),%sp                  | ...and its stack.

/* copy bootinfo records from the loader to _end */
        lea     SYMBOL_NAME(_end), %a1
        lea     BI_START, %a0
        /* number of longs to copy */
        movel   %a0@, %d0
1:      addl    #4, %a0
        movel   %a0@, %a1@
        addl    #4, %a1
        dbf     %d0, 1b
        
/* Point MSP at an invalid page to trap if it's used. --m */
        movl    #(PAGESIZE),%d0
        movc    %d0,%msp
        moveq   #-1,%d0
        movsb   %d0,(AC_SEGMAP+0x0)

        jbsr    SYMBOL_NAME(sun3_init)

        jbsr    SYMBOL_NAME(base_trap_init)
                        
        jbsr    SYMBOL_NAME(start_kernel)
        trap    #15                     

        .data
        .even
SYMBOL_NAME_LABEL(kpt)
        .long 0
SYMBOL_NAME_LABEL(availmem)
        .long 0
| todo: remove next two. --m
SYMBOL_NAME_LABEL(is_medusa)
        .long 0
SYMBOL_NAME_LABEL(m68k_pgtable_cachemode)
        .long 0