zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/boot/common/src/loader/cpu/m0/start.S b/boot/common/src/loader/cpu/m0/start.S
new file mode 100644
index 0000000..848b5a0
--- /dev/null
+++ b/boot/common/src/loader/cpu/m0/start.S
@@ -0,0 +1,226 @@
+/*
+ * (C) Copyright 2016 ZXIC Inc.
+ *
+ */
+
+#include <config.h>
+#include <board.h>
+#include <load_mode.h>
+
+.globl stack_setup
+
+stack:
+#if (CONFIG_DL_DISABLE)
+ .word 0x045A0000 /* DL port: 0x5A->Disable. */
+#else
+ .word 0x04000000 /* DL port: 0x00->Enable. */
+#endif
+ .word 0x3537585A /* = string "57XZ" */
+ .word 0x31563132 /* = string "1V12" */
+ .word 0x00001E70 /* zdata size = 8K - HdrSize = 8192 - 400 = 7792 Bytes = 0x1E70*/
+
+ /* NOT used now, Just reverse memory for RSA/HASH in near future. */
+ .word 0x00000000 /*puk_rsa_d*/
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+
+ .word 0x00000000 /*puk_rsa_n*/
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+
+ .word 0x00000000 /*hash_y*/
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000
+ .word 0x00000000 /* VID+PID */
+#if defined(CFG_ZLOAD)
+ .word 0x00102800
+ .word _start - 0x100000 + 0x8A001 /* TBD: MACRO instead of number. */
+#else
+ .word 0x0008A000
+ .word _start + 0x1
+#endif
+ .word loop + 1
+ .word loop + 1
+
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+ nop
+ nop
+
+.globl _bss_end
+_bss_end:
+ .word __bss_end
+
+.globl _para_start
+_para_start:
+ .word __para_start
+
+.globl _para_end
+_para_end:
+ .word __para_end
+
+.globl _start
+_start:
+
+#if defined(CFG_ZLOAD)
+ /* check stage1 state */
+ ldr r3,=CFG_START_STAGE1_ADDR
+ ldr r4,=CFG_START_STAGE1_STATE
+ ldr r5, [r3]
+ cmp r4, r5
+ beq set_stack
+
+ ldr r0, =0x8a000
+ msr MSP, r0
+
+ bl copy_to_iram1
+ ldr r3,=0x1001B1 /* 0x1b1 = 0x194(header len) + 0x1c(first Ins. offset) + 0x1(16bit thumb instruction) */
+ mov pc,r3
+set_stack:
+ /* Set up the stack */
+ ldr r2, =0x100000
+ ldr r3,=0x194 /*header len=0x194*/
+ add r2,r3
+ ldr r0, [r2]
+ msr MSP, r0
+
+#else
+
+ /* Set up the stack */
+ ldr r2, =stack
+ ldr r3,=0x194 /*header len=0x194*/
+ add r2,r3
+ ldr r0, [r2]
+ msr MSP, r0
+
+#endif /* CFG_ZLOAD */
+
+/* clear the bss */
+clear_bss:
+ ldr r3, =_bss_start
+ ldr r0, [r3] /* find start of bss segment */
+ ldr r3, =_bss_end
+ ldr r1, [r3] /* stop here */
+ cmp r0, r1
+ beq clbss_over
+ mov r2, #0x0 /* clear value */
+clbss_l:
+ str r2, [r0] /* clear BSS location */
+ add r0, r0, #4 /* increment clear index pointer */
+ cmp r0, r1 /* are we at the end yet */
+ bne clbss_l /* keep clearing till at end */
+clbss_over:
+
+/* remove the para section */
+ ldr r3, =_para_start
+ ldr r4, [r3]
+ ldr r3, =_para_end
+ ldr r1, [r3]
+ sub r1, r1, r4
+ ldr r3, =_bss_end
+ ldr r0, [r3]
+ add r1, r1, r0
+ cmp r0, r1
+ beq remove_over
+re_move:
+ ldr r2, [r0]
+ str r2, [r4]
+ add r4, r4, #4
+ add r0, r0, #4 /* increment clear index pointer */
+ cmp r0, r1 /* are we at the end yet */
+ bne re_move
+remove_over:
+
+ b start_armboot
+
+loop:
+ b loop
+