FreeCalypso > hg > freecalypso-sw
diff nuc-fw/sysglue/sysinit.S @ 79:947b1f473960
beginning of nuc-fw
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
---|---|
date | Sun, 11 Aug 2013 07:17:25 +0000 |
parents | |
children | 39b1c369b67f |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/nuc-fw/sysglue/sysinit.S Sun Aug 11 07:17:25 2013 +0000 @@ -0,0 +1,41 @@ +/* + * This assembly module, which puts bits of code into several different + * sections, contains those essential entry point etc bits which are common + * to both the regular flashable build and the fc-xram development build. + */ + + .section iram.vectors + .code 32 +/* no useful handlers for the 5 error exceptions yet */ + b . + b . + b . + b . + b . +/* IRQ */ + b _INT_IRQ +/* no useful FIQ handler yet */ + b . + + .section xip.text + .code 32 + .globl _FlashorXram_entry +_FlashorXram_entry: +/* first order of business: copy iram.text to where it's supposed to be */ + ldr r8, =__iramtext_flash_addr + ldr r9, =__iramtext_ram_addr + ldr r10, =__iramtext_size +1: ldm r8!, {r0-r7} + stm r9!, {r0-r7} + subs r10, r10, #0x20 + bhi 1b +/* now we can call any function w/o worry as to where it lives */ +/* clear int.bss and ext.bss, using bzero() from libc */ + ldr r0, =__intbss_start + ldr r1, =__intbss_size + bl bzero + ldr r0, =__extbss_start + ldr r1, =__extbss_size + bl bzero +/* we can start Nucleus now! */ + b INT_Initialize