FreeCalypso > hg > freecalypso-sw
comparison 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 |
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| 78:2c266d4339ff | 79:947b1f473960 |
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| 1 /* | |
| 2 * This assembly module, which puts bits of code into several different | |
| 3 * sections, contains those essential entry point etc bits which are common | |
| 4 * to both the regular flashable build and the fc-xram development build. | |
| 5 */ | |
| 6 | |
| 7 .section iram.vectors | |
| 8 .code 32 | |
| 9 /* no useful handlers for the 5 error exceptions yet */ | |
| 10 b . | |
| 11 b . | |
| 12 b . | |
| 13 b . | |
| 14 b . | |
| 15 /* IRQ */ | |
| 16 b _INT_IRQ | |
| 17 /* no useful FIQ handler yet */ | |
| 18 b . | |
| 19 | |
| 20 .section xip.text | |
| 21 .code 32 | |
| 22 .globl _FlashorXram_entry | |
| 23 _FlashorXram_entry: | |
| 24 /* first order of business: copy iram.text to where it's supposed to be */ | |
| 25 ldr r8, =__iramtext_flash_addr | |
| 26 ldr r9, =__iramtext_ram_addr | |
| 27 ldr r10, =__iramtext_size | |
| 28 1: ldm r8!, {r0-r7} | |
| 29 stm r9!, {r0-r7} | |
| 30 subs r10, r10, #0x20 | |
| 31 bhi 1b | |
| 32 /* now we can call any function w/o worry as to where it lives */ | |
| 33 /* clear int.bss and ext.bss, using bzero() from libc */ | |
| 34 ldr r0, =__intbss_start | |
| 35 ldr r1, =__intbss_size | |
| 36 bl bzero | |
| 37 ldr r0, =__extbss_start | |
| 38 ldr r1, =__extbss_size | |
| 39 bl bzero | |
| 40 /* we can start Nucleus now! */ | |
| 41 b INT_Initialize |