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Hook in low-level UART init

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1511 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-02-18 03:22:17 +00:00
parent c840ae9487
commit 386cebd287
1 changed files with 50 additions and 0 deletions
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50
arch/sh/src/m16c/m16c_head.S
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@ -39,6 +39,7 @@
#include <nuttx/config.h>
#include "chip.h"
#include "up_internal.h"
/************************************************************************************
* Pre-processor Definitions
@ -48,6 +49,22 @@
* Macro Definitions
************************************************************************************/
/*****************************************************************************
* Name: showprogress
*
* Description:
* Print a character on the UART to show boot status.
*
*****************************************************************************/
.macro showprogress, code
#ifdef CONFIG_DEBUG
.globl _up_lowputc
mov.b r#\code1l /* Character to print */
jsr.a _up_lowputc /* Print it */
#endif
.endm
/************************************************************************************
* Data
************************************************************************************/
@ -186,6 +203,12 @@ __start:
ldc r1, intbh
ldc r0, intbl
/* Configure the uart so that we can get debug output as soon as possible. */
.globl _up_lowsetup /* Early initialization of UART */
jsr.a _up_lowsetup
showprogress 'A'
/* Clear near .bss sections */
mov.b #0x00, r0l /* r0l: 0 */
@ -196,6 +219,8 @@ __start:
/* Clear far .bss sections */
showprogress 'B'
#ifdef CONFIG_M16C_HAVEFARRAM
# warning "Far RAM support not implemented"
#endif
@ -211,10 +236,35 @@ __start:
/* Initialize far .data sections (.rodata is not moved) */
showprogress 'C'
#ifdef CONFIG_M16C_HAVEFARRAM
# warning "Far RAM support not implemented"
#endif
/* Perform early serial initialization */
#ifdef CONFIG_USE_EARLYSERIALINIT
.globl _up_earlyserialinit /* Early initialization of serial driver */
jsr.a _up_earlyserialinit /* Call it */
showprogress 'D'
#endif
/* Call C++ constructors */
#ifdef CONFIG_CPLUSPLUS
# warning "No C++ support yet"
showprogress 'E'
#endif
/* Initialize onboard LEDs */
#ifdef CONFIG_ARCH_LEDS
.globl _up_ledinit /* Boot LED setup */
jsr.a _up_ledinit /* Call it */
#endif
showprogress '\n'
/* Pass control to NuttX */
.globl _os_start