Added missing tegra files.HEADmaster

1 files changed, 128 insertions, 0 deletions

diff --git a/arch/m68k/platform/68328/head-de2.S b/arch/m68k/platform/68328/head-de2.S
new file mode 100644
index 00000000000..f632fdcb93e
--- /dev/null
+++ b/arch/m68k/platform/68328/head-de2.S
@@ -0,0 +1,128 @@
+
+#define MEM_END 0x00800000      /* Memory size 8Mb */
+
+#undef CRT_DEBUG
+
+.macro  PUTC CHAR
+#ifdef CRT_DEBUG
+        moveq   #\CHAR, %d7
+        jsr     putc
+#endif
+.endm
+
+        .global _start
+        .global _rambase
+        .global _ramvec
+        .global _ramstart
+        .global _ramend
+        
+        .data
+
+/*
+ *      Set up the usable of RAM stuff
+ */
+_rambase:
+        .long   0
+_ramvec:
+        .long   0
+_ramstart:
+        .long   0
+_ramend:
+        .long   0
+
+        .text
+
+_start:
+
+/*
+ * Setup initial stack
+ */
+        /* disable all interrupts */
+        movew   #0x2700, %sr
+        movel   #-1, 0xfffff304
+        movel   #MEM_END-4, %sp
+
+        PUTC    '\r'
+        PUTC    '\n'
+        PUTC    'A'
+        PUTC    'B'
+
+/*
+ *      Determine end of RAM
+ */
+
+        movel   #MEM_END, %a0
+        movel   %a0, _ramend
+
+        PUTC    'C'
+
+/*
+ *      Move ROM filesystem above bss :-)
+ */
+
+        moveal  #_sbss, %a0                     /* romfs at the start of bss */
+        moveal  #_ebss, %a1                     /* Set up destination  */
+        movel   %a0, %a2                        /* Copy of bss start */
+
+        movel   8(%a0), %d1                     /* Get size of ROMFS */
+        addql   #8, %d1                         /* Allow for rounding */
+        andl    #0xfffffffc, %d1        /* Whole words */
+
+        addl    %d1, %a0                        /* Copy from end */
+        addl    %d1, %a1                        /* Copy from end */
+        movel   %a1, _ramstart          /* Set start of ram */
+
+1:
+        movel   -(%a0), %d0                     /* Copy dword */
+        movel   %d0, -(%a1)
+        cmpl    %a0, %a2                        /* Check if at end */
+        bne     1b
+
+        PUTC    'D'
+
+/*
+ * Initialize BSS segment to 0
+ */
+
+        lea     _sbss, %a0
+        lea     _ebss, %a1
+
+        /* Copy 0 to %a0 until %a0 == %a1 */
+2:      cmpal   %a0, %a1
+        beq     1f
+        clrl    (%a0)+
+        bra     2b
+1:
+
+        PUTC    'E'
+
+/*
+ * Load the current task pointer and stack
+ */
+
+        lea     init_thread_union, %a0
+        lea     0x2000(%a0), %sp
+
+        PUTC    'F'
+        PUTC    '\r'
+        PUTC    '\n'
+
+/*
+ * Go
+ */
+
+        jmp     start_kernel
+
+/*
+ * Local functions
+ */
+ 
+#ifdef CRT_DEBUG
+putc:
+        moveb   %d7, 0xfffff907
+1:
+        movew   0xfffff906, %d7
+        andw    #0x2000, %d7
+        beq     1b
+        rts
+#endif