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add option SMDK2XX0_CLOCK_CONFIG to change CPU clock at kernel startup.

This commit is contained in:
bsh 2003-08-29 12:41:12 +00:00
parent 23b593ca51
commit e979aaa6ea
2 changed files with 34 additions and 2 deletions
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4
sys/arch/evbarm/conf/files.smdk2410
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@ -1,4 +1,4 @@
# $NetBSD: files.smdk2410,v 1.1 2003/07/31 20:11:45 bsh Exp $
# $NetBSD: files.smdk2410,v 1.2 2003/08/29 12:41:12 bsh Exp $
#
# Samsung SMDK2410 evaluation board configuration info
#
@ -6,5 +6,7 @@
# CPU support and integrated peripherals
include "arch/arm/s3c2xx0/files.s3c2410"
defparam opt_smdk2xx0.h SMDK2XX0_CLOCK_CONFIG
file arch/evbarm/smdk2xx0/smdk2410_machdep.c

32
sys/arch/evbarm/smdk2xx0/smdk2410_start.S
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@ -1,4 +1,4 @@
/* $NetBSD: smdk2410_start.S,v 1.3 2003/08/29 12:07:33 bsh Exp $ */
/* $NetBSD: smdk2410_start.S,v 1.4 2003/08/29 12:41:12 bsh Exp $ */
/*
* Copyright (c) 2002, 2003 Fujitsu Component Limited
@ -38,6 +38,7 @@
#include <arm/arm32/pmap.h> /* for PMAP_DOMAIN_KERNEL */
#include <arm/s3c2xx0/s3c2410reg.h> /* for S3C2410_SDRAM_START */
#include "opt_smdk2xx0.h" /* SMDK2XX0_CLOCK_CONFIG */
/*
* Kernel start routine for Samsung SMDK2410.
@ -58,6 +59,26 @@ _C_LABEL(smdk2410_start):
orr r0, r0, #I32_bit
msr cpsr, r0
#ifdef SMDK2XX0_CLOCK_CONFIG
adr r4, clock_config_data
mov r2, #S3C2410_CLKMAN_BASE
ldr r1, [r2, #CLKMAN_CLKSLOW]
orr r0, r1, #CLKSLOW_SLOW
str r0, [r2, #CLKMAN_CLKSLOW]
nop
nop
ldmia r4, {r0,r3}
str r0, [r2, #CLKMAN_CLKDIVN]
str r3, [r2, #CLKMAN_MPLLCON]
nop
nop
str r1, [r2, #CLKMAN_CLKSLOW]
#endif
/* Are we running on right place ? */
adr r0, _C_LABEL(smdk2410_start)
ldr r2, =KERNEL_TEXT_ADDR
@ -152,6 +173,15 @@ smdk2410_start_ram:
Lstart:
.word start
.macro clock_data hdivn, pdivn, mdiv, pdiv, sdiv
.word (\hdivn)<<1 | \pdivn
.word (\mdiv)<<PLLCON_MDIV_SHIFT | (\pdiv)<<PLLCON_PDIV_SHIFT | (\sdiv)<<PLLCON_SDIV_SHIFT
.endm
#ifdef SMDK2XX0_CLOCK_CONFIG
clock_config_data:
clock_data SMDK2XX0_CLOCK_CONFIG
#endif
#define MMU_INIT(va,pa,n_sec,attr) \
.word n_sec ; \
.word 4*((va)>>L1_S_SHIFT) ; \