diff options
| author | wdenk <wdenk> | 2004-01-04 16:28:35 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2004-01-04 16:28:35 +0000 |
| commit | 180d3f74e4738ee107e269cbb949481075dd789a (patch) | |
| tree | ce40863d3e1b3ff07a5027d788ff1fdb5416d0d7 /cpu/mpc8xx/interrupts.c | |
| parent | dd875c767e6fb0f4fecfb799b706d84562a7acee (diff) | |
| download | u-boot-imx-180d3f74e4738ee107e269cbb949481075dd789a.zip u-boot-imx-180d3f74e4738ee107e269cbb949481075dd789a.tar.gz u-boot-imx-180d3f74e4738ee107e269cbb949481075dd789a.tar.bz2 | |
* Fix problems caused by Robert Schwebel's cramfs patch
* Patch by Scott McNutt, 02 Jan 2004:
Add support for the Nios Active Serial Memory Interface (ASMI)
on Cyclone devices
* Patch by Andrea Marson, 16 Dec 2003:
Add support for the PPChameleon ME and HI modules
* Patch by Yuli Barcohen, 22 Dec 2003:
Add support for Motorola DUET ADS board (MPC87x/88x)
Diffstat (limited to 'cpu/mpc8xx/interrupts.c')
| -rw-r--r-- | cpu/mpc8xx/interrupts.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/cpu/mpc8xx/interrupts.c b/cpu/mpc8xx/interrupts.c index 558dc09..20e7012 100644 --- a/cpu/mpc8xx/interrupts.c +++ b/cpu/mpc8xx/interrupts.c @@ -274,11 +274,21 @@ void timer_interrupt_cpu (struct pt_regs *regs) /* Reset Timer Expired and Timers Interrupt Status */ immr->im_clkrstk.cark_plprcrk = KAPWR_KEY; __asm__ ("nop"); -#ifdef CONFIG_MPC866_et_al - immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS; -#else - immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS | PLPRCR_TMIST; -#endif + /* + Clear TEXPS (and TMIST on older chips). SPLSS (on older + chips) is cleared too. + + Bitwise OR is a read-modify-write operation so ALL bits + which are cleared by writing `1' would be cleared by + operations like + + immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS; + + The same can be achieved by simple writing of the PLPRCR + to itself. If a bit value should be preserved, read the + register, ZERO the bit and write, not OR, the result back. + */ + immr->im_clkrst.car_plprcr = immr->im_clkrst.car_plprcr; } /************************************************************************/ |