diff options
| author | wdenk <wdenk> | 2003-07-24 23:38:38 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2003-07-24 23:38:38 +0000 |
| commit | 27b207fd0a0941b03f27e2a82c0468b1a090c745 (patch) | |
| tree | 4d339d7a2a00889f09a876425ce430be57de56e9 /cpu/mpc824x | |
| parent | 2535d60277cc295adf75cd5721dcecd840c69a63 (diff) | |
| download | u-boot-imx-27b207fd0a0941b03f27e2a82c0468b1a090c745.zip u-boot-imx-27b207fd0a0941b03f27e2a82c0468b1a090c745.tar.gz u-boot-imx-27b207fd0a0941b03f27e2a82c0468b1a090c745.tar.bz2 | |
* Implement new mechanism to export U-Boot's functions to standalone
applications: instead of using (PPC-specific) system calls we now
use a jump table; please see doc/README.standalone for details
* Patch by Dave Westwood, 24 Jul 2003:
added support for Unity OS (a proprietary OS)
Diffstat (limited to 'cpu/mpc824x')
| -rw-r--r-- | cpu/mpc824x/drivers/i2c/i2c1.c | 11 | ||||
| -rw-r--r-- | cpu/mpc824x/start.S | 69 |
2 files changed, 8 insertions, 72 deletions
diff --git a/cpu/mpc824x/drivers/i2c/i2c1.c b/cpu/mpc824x/drivers/i2c/i2c1.c index dc1c97c..94c671e 100644 --- a/cpu/mpc824x/drivers/i2c/i2c1.c +++ b/cpu/mpc824x/drivers/i2c/i2c1.c @@ -1197,13 +1197,16 @@ int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len) uchar *p; int i; - p = dummy_buffer; /* fill in address in big endian order */ - for (i=0; i<alen; ++i) - *p++ = (addr >> (i * 8)) & 0xFF; + for (i=alen-1; i>=0; --i) { + buffer[i] = addr & 0xFF; + addr >>= 8; + } /* fill in data */ + p = dummy_buffer + alen; + for (i=0; i<len; ++i) - *p++ = *buffer; + *p++ = *buffer++; status = I2C_do_buffer (0, I2C_MASTER_XMIT, chip, alen + len, dummy_buffer, I2C_STOP, 1, I2C_NO_RESTART); diff --git a/cpu/mpc824x/start.S b/cpu/mpc824x/start.S index b1cdb84..a22137c 100644 --- a/cpu/mpc824x/start.S +++ b/cpu/mpc824x/start.S @@ -259,74 +259,7 @@ ProgramCheck: STD_EXCEPTION(EXC_OFF_DECR, Decrementer, timer_interrupt) STD_EXCEPTION(0xa00, Trap_0a, UnknownException) STD_EXCEPTION(0xb00, Trap_0b, UnknownException) - - . = 0xc00 -/* - * r0 - SYSCALL number - * r3-... arguments - */ -SystemCall: - addis r11,r0,0 /* get functions table addr */ - ori r11,r11,0 /* Note: this code is patched in trap_init */ - addis r12,r0,0 /* get number of functions */ - ori r12,r12,0 - - cmplw 0, r0, r12 - bge 1f - - rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */ - add r11,r11,r0 - lwz r11,0(r11) - - li r20,0xd00-4 /* Get stack pointer */ - lwz r12,0(r20) - subi r12,r12,12 /* Adjust stack pointer */ - li r0,0xc00+_end_back-SystemCall - cmplw 0, r0, r12 /* Check stack overflow */ - bgt 1f - stw r12,0(r20) - - mflr r0 - stw r0,0(r12) - mfspr r0,SRR0 - stw r0,4(r12) - mfspr r0,SRR1 - stw r0,8(r12) - - li r12,0xc00+_back-SystemCall - mtlr r12 - mtspr SRR0,r11 - -1: SYNC - rfi - -_back: - - mfmsr r11 /* Disable interrupts */ - li r12,0 - ori r12,r12,MSR_EE - andc r11,r11,r12 - SYNC /* Some chip revs need this... */ - mtmsr r11 - SYNC - - li r12,0xd00-4 /* restore regs */ - lwz r12,0(r12) - - lwz r11,0(r12) - mtlr r11 - lwz r11,4(r12) - mtspr SRR0,r11 - lwz r11,8(r12) - mtspr SRR1,r11 - - addi r12,r12,12 /* Adjust stack pointer */ - li r20,0xd00-4 - stw r12,0(r20) - - SYNC - rfi -_end_back: + STD_EXCEPTION(0xc00, SystemCall, UnknownException) STD_EXCEPTION(EXC_OFF_TRACE, SingleStep, UnknownException) |