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2009-09-09 Till Straumann <strauman@slac.stanford.edu>

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* startup/bspstart.c: Added dummy implementation of firmware
	syscalls for use with QEMU. Dummy handler is installed if no
	pre-existing firmware handler is found.
This commit is contained in:
Till Straumann
2009-09-09 14:17:10 +00:00
parent 32b09a90f4
commit 6597e5839f
2 changed files with 46 additions and 0 deletions
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6
c/src/lib/libbsp/m68k/uC5282/ChangeLog
View File

@@ -1,3 +1,9 @@
2009-09-09 Till Straumann <strauman@slac.stanford.edu>
* startup/bspstart.c: Added dummy implementation of firmware
syscalls for use with QEMU. Dummy handler is installed if no
pre-existing firmware handler is found.
2009-07-30 Eric Norum <norume@aps.anl.gov>
* include/bsp.h, network/network.c, startup/bspstart.c: Try enabling

40
c/src/lib/libbsp/m68k/uC5282/startup/bspstart.c
View File

@@ -188,6 +188,8 @@ void _CPU_cache_invalidate_1_data_line(const void *addr)
void bsp_libc_init( void *, uint32_t, int );
void bsp_pretasking_hook(void); /* m68k version */
extern void bsp_fake_syscall();
/*
* The Arcturus boot ROM prints exception information improperly
* so use this default exception handler instead. This one also
@@ -260,6 +262,13 @@ void bsp_start( void )
if (i != (32+2)) /* Catch all but bootrom system calls */
*((void (**)(int))(i * 4)) = handler;
/*
* Qemu has no trap handler; install our fake syscall
* implementation if there is no existing handler.
*/
if ( 0 == *((void (**)(int))((32+2) * 4)) )
*((void (**)(int))((32+2) * 4)) = bsp_fake_syscall;
/*
* Need to "allocate" the memory for the RTEMS Workspace and
* tell the RTEMS configuration where it is. This memory is
@@ -419,6 +428,37 @@ syscall_2(int, program, bsp_mnode_t *, chain, int, flags)
syscall_3(int, flash_erase_range, volatile unsigned short *, flashptr, int, start, int, end);
syscall_3(int, flash_write_range, volatile unsigned short *, flashptr, bsp_mnode_t *, chain, int, offset);
/* Provide a dummy-implementation of these syscalls
* for qemu (which lacks the firmware).
*/
#define __STR(x) #x
#define __STRSTR(x) __STR(x)
#define ERRVAL __STRSTR(EACCES)
/* reset-control register */
#define RCR "__IPSBAR + 0x110000"
asm(
"bsp_fake_syscall: \n"
" cmpl #0, %d0 \n" /* sysreset */
" bne 1f \n"
" moveb #0x80, %d0 \n"
" moveb %d0, "RCR" \n" /* reset-controller */
/* should never get here - but we'd return -EACCESS if we do */
"1: \n"
" cmpl #12, %d0 \n" /* gethwaddr */
" beq 2f \n"
" cmpl #14, %d0 \n" /* getbenv */
" beq 2f \n"
" movel #-"ERRVAL", %d0 \n" /* return -EACCESS */
" rte \n"
"2: \n"
" movel #0, %d0 \n" /* return NULL */
" rte \n"
);
/*
* 'Extended BSP' routines
* Should move to cpukit/score/cpu/m68k/cpu.c someday.