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| author | Markus Klotzbücher <Markus Klotzbümk@pollux.(none)> | 2006-02-07 20:04:48 +0100 |
|---|---|---|
| committer | Markus Klotzbücher <mk@pollux.(none)> | 2006-02-07 20:04:48 +0100 |
| commit | e0269579a5b546b8f4e9ede82dc1cc3fa3796e02 (patch) | |
| tree | 0ac8cf5589a58887a22afd25a4fb4abdc288f643 /cpu/pxa/start.S | |
| parent | 57cac1fa547fa590fe4b7992619b9f26417014c3 (diff) | |
| download | u-boot-imx-e0269579a5b546b8f4e9ede82dc1cc3fa3796e02.zip u-boot-imx-e0269579a5b546b8f4e9ede82dc1cc3fa3796e02.tar.gz u-boot-imx-e0269579a5b546b8f4e9ede82dc1cc3fa3796e02.tar.bz2 | |
This is the first commit for the u-boot zylonite port. The following has be
done so far:
* created zylonite board dir (based on lubbock)
* extended some - but not all pxa sources and headers for Intel
Monahans support (CONFIG_CPU_MONAHANS)
* created Makefile zylonite target + MAKEALL entry
* added some debug nonsense, remove later, grep for mk@tbd
Status: compiles (eldk-4.0), and can be started with BDI, but runs forever
and doesn't halt at breakpoints. Hmmm...
Diffstat (limited to 'cpu/pxa/start.S')
| -rw-r--r-- | cpu/pxa/start.S | 44 |
1 files changed, 32 insertions, 12 deletions
diff --git a/cpu/pxa/start.S b/cpu/pxa/start.S index a8cc080..9940826 100644 --- a/cpu/pxa/start.S +++ b/cpu/pxa/start.S @@ -190,10 +190,10 @@ cpuspeed: .word CFG_CPUSPEED #endif - /* RS: ??? */ - .macro CPWAIT - mrc p15,0,r0,c2,c0,0 - mov r0,r0 + /* takes care the CP15 update has taken place */ + .macro CPWAIT reg + mrc p15,0,\reg,c2,c0,0 + mov \reg,\reg sub pc,pc,#4 .endm @@ -201,13 +201,28 @@ cpuspeed: .word CFG_CPUSPEED cpu_init_crit: /* mask all IRQs */ +#ifndef CONFIG_CPU_MONAHANS + ldr r0, IC_BASE mov r1, #0x00 str r1, [r0, #ICMR] +#else + /* Step 1 - Enable CP6 permission */ + mrc p15, 0, r1, c15, c1, 0 @ read CPAR + orr r1, r1, #0x40 + mcr p15, 0, r1, c15, c1, 0 + CPWAIT r1 + + /* Step 2 - Mask ICMR & ICMR2 */ + mov r1, #0 + mcr p6, 0, r1, c1, c0, 0 @ ICMR + mcr p6, 0, r1, c7, c0, 0 @ ICMR2 +#endif -#if defined(CFG_CPUSPEED) - - /* set clock speed */ +#ifndef CONFIG_CPU_MONAHANS +#ifdef CFG_CPUSPEED + + /* set clock speed tbd@mk: required for monahans? */ ldr r0, CC_BASE ldr r1, cpuspeed str r1, [r0, #CCCR] @@ -215,7 +230,10 @@ cpu_init_crit: mcr p14, 0, r0, c6, c0, 0 setspeed_done: -#endif + +#endif /* CFG_CPUSPEED */ +#endif /* CONFIG_CPU_MONAHANS */ + /* * before relocating, we have to setup RAM timing @@ -227,19 +245,21 @@ setspeed_done: mov lr, ip /* Memory interfaces are working. Disable MMU and enable I-cache. */ + /* mk: hmm, this is not in the monahans docs, leave it now but + * check here if it doesn't work :-) */ ldr r0, =0x2001 /* enable access to all coproc. */ mcr p15, 0, r0, c15, c1, 0 - CPWAIT + CPWAIT r0 mcr p15, 0, r0, c7, c10, 4 /* drain the write & fill buffers */ - CPWAIT + CPWAIT r0 mcr p15, 0, r0, c7, c7, 0 /* flush Icache, Dcache and BTB */ - CPWAIT + CPWAIT r0 mcr p15, 0, r0, c8, c7, 0 /* flush instuction and data TLBs */ - CPWAIT + CPWAIT r0 /* Enable the Icache */ /* |