GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cubieboard: Setup CPU clock in romstage and load ramstage 

This completes the romstage for the cubieboard.

Change-Id: If3272d8a9e414f782892bc41b34b5e2dece5d7e1
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4686
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Alexandru Gagniuc 2014-01-03 01:27:23 -05:00
parent 601b5b5302
commit 93b600ded7
1 changed files with 25 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
src/mainboard/cubietech/cubieboard/romstage.c
View File

@ -1,10 +1,17 @@
/*
* Placeholder for Cubieboard romstage
* Basic romstage for Cubieboard
*
* Set up system voltages, then increase the CPU clock, before turning control
* to ramstage. The CPU VDD needs to be properly set before it can run at full
* speed. Setting the CPU at full speed helps lzma-decompress ramstage a lot
* faster.
*
* Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
* Subject to the GNU GPL v2, or (at your option) any later version.
*/
#include <arch/stages.h>
#include <cbfs.h>
#include <console/console.h>
#include <cpu/allwinner/a10/clock.h>
#include <cpu/allwinner/a10/gpio.h>
@ -63,10 +70,25 @@ static enum cb_err cubieboard_setup_power(void)
void main(void)
{
void *entry;
enum cb_err err;
console_init();
printk(BIOS_INFO, "You have managed to succesfully load romstage.\n");
/* Configure power rails */
cubieboard_setup_power();
err = cubieboard_setup_power();
if (err == CB_SUCCESS) {
/* TODO: Get this clock from devicetree.cb */
a1x_set_cpu_clock(1008);
} else {
/* cubieboard_setup_power() prints more details */
printk(BIOS_WARNING, "Will run CPU at reduced speed\n");
a1x_set_cpu_clock(384);
}
entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, "fallback/coreboot_ram");
printk(BIOS_INFO, "entry is 0x%p, leaving romstage.\n", entry);
stage_exit(entry);
}