1 files changed, 123 insertions, 0 deletions

diff --git a/arch/alpha/boot/head.S b/arch/alpha/boot/head.S
new file mode 100644
index 000000000000..f3d98089b3dc
--- /dev/null
+++ b/arch/alpha/boot/head.S
@@ -0,0 +1,123 @@
+/*
+ * arch/alpha/boot/head.S
+ *
+ * initial bootloader stuff..
+ */
+
+#include <asm/system.h>
+
+        .set noreorder
+        .globl  __start
+        .ent    __start
+__start:
+        br      $29,2f
+2:      ldgp    $29,0($29)
+        jsr     $26,start_kernel
+        call_pal PAL_halt
+        .end __start
+
+        .align 5
+        .globl  wrent
+        .ent    wrent
+wrent:
+        .prologue 0
+        call_pal PAL_wrent
+        ret ($26)
+        .end wrent
+
+        .align 5
+        .globl  wrkgp
+        .ent    wrkgp
+wrkgp:
+        .prologue 0
+        call_pal PAL_wrkgp
+        ret ($26)
+        .end wrkgp
+
+        .align 5
+        .globl  switch_to_osf_pal
+        .ent    switch_to_osf_pal
+switch_to_osf_pal:
+        subq    $30,128,$30
+        .frame  $30,128,$26
+        stq     $26,0($30)
+        stq     $1,8($30)
+        stq     $2,16($30)
+        stq     $3,24($30)
+        stq     $4,32($30)
+        stq     $5,40($30)
+        stq     $6,48($30)
+        stq     $7,56($30)
+        stq     $8,64($30)
+        stq     $9,72($30)
+        stq     $10,80($30)
+        stq     $11,88($30)
+        stq     $12,96($30)
+        stq     $13,104($30)
+        stq     $14,112($30)
+        stq     $15,120($30)
+        .prologue 0
+
+        stq     $30,0($17)      /* save KSP in PCB */
+
+        bis     $30,$30,$20     /* a4 = KSP */
+        br      $17,1f
+
+        ldq     $26,0($30)
+        ldq     $1,8($30)
+        ldq     $2,16($30)
+        ldq     $3,24($30)
+        ldq     $4,32($30)
+        ldq     $5,40($30)
+        ldq     $6,48($30)
+        ldq     $7,56($30)
+        ldq     $8,64($30)
+        ldq     $9,72($30)
+        ldq     $10,80($30)
+        ldq     $11,88($30)
+        ldq     $12,96($30)
+        ldq     $13,104($30)
+        ldq     $14,112($30)
+        ldq     $15,120($30)
+        addq    $30,128,$30
+        ret ($26)
+1:      call_pal PAL_swppal
+        .end    switch_to_osf_pal
+
+        .align 3
+        .globl  tbi
+        .ent    tbi
+tbi:
+        .prologue 0
+        call_pal PAL_tbi
+        ret     ($26)
+        .end tbi
+
+        .align 3
+        .globl  halt
+        .ent    halt
+halt:
+        .prologue 0
+        call_pal PAL_halt
+        .end halt
+
+/* $16 - new stack page */
+        .align 3
+        .globl  move_stack
+        .ent    move_stack
+move_stack:
+        .prologue 0
+        lda     $0, 0x1fff($31)
+        and     $0, $30, $1                     /* Stack offset */
+        or      $1, $16, $16                    /* New stack pointer */
+        mov     $30, $1
+        mov     $16, $2
+1:      ldq     $3, 0($1)                       /* Move the stack */
+        addq    $1, 8, $1
+        stq     $3, 0($2)
+        and     $0, $1, $4
+        addq    $2, 8, $2
+        bne     $4, 1b
+        mov     $16, $30
+        ret     ($26)
+        .end move_stack