Mercurial > lcfOS

annotate kernel/arch/qemu_vexpress/startup_a9.asm @ 381:6df89163e114

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix section and ldr pseudo instruction
author Windel Bouwman
date Sat, 26 Apr 2014 17:41:56 +0200
parents kernel/startup_a9.asm@9667d78ba79e
children d056b552d3f4
rev   line source
340
c7cc54c0dfdf Test featurebranch
Windel Bouwman
parents:
diff changeset
1
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
2 section code
375
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
3
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
4 interrupt_vector_table:
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
5 ivt_reset: B start ; 0x0 reset
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
6 ivt_undef: B undef_handler ; 0x4 undefined instruction
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
7 ivt_svc: B undef_handler ; 0x08 Supervisor call
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
8 ivt_prefetch: B undef_handler ; 0x0C prefetch abort
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
9 ivt_data: B undef_handler ; 0x10 data abort
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
10 ivt_hyptrap: B undef_handler ; 0x14 not used
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
11 ivt_irq: B undef_handler ; 0x18 IRQ
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
12 ivt_fiq: B undef_handler ; 0x18 FIQ
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
13
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
14
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
15 start:
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
16
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
17 ; Setup TTBR1 (translation table base register)
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
18
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
19 ldr r0, =kernel_table0 ; pseudo instruction which loads the value of the symbol
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
20 ; -KERNEL_BASE
375
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
21 mcr p15, 0, r0, c2, c0, 1 ; TTBR1
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
22 mcr p15, 0, r0, c2, c0, 0 ; TTBR0
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
23
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
24 ; Prepare the TTBCR (translation table base control register)
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
25 mov r0, 0x1 ; TBD: why set this to 1?
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
26 mcr p15, 0, r0, c2, c0, 2
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
27
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
28 ; Enable the VMSA (Virtual memory system architecture):
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
29 mrc p15, 0, r0, c1, c0, 0
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
30 ; TODO:
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
31 ; orr r0, r0, 0x1
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
32 mcr p15, 0, r0, c1, c0, 0
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
33
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
34 ; Setup stack:
352
899ae3aea803 First kernel run for vexpressA9
Windel Bouwman
parents: 340
diff changeset
35 mov sp, 0x30000
899ae3aea803 First kernel run for vexpressA9
Windel Bouwman
parents: 340
diff changeset
36 BL kernel_start ; Branch to main (this is actually in the interrupt vector)
899ae3aea803 First kernel run for vexpressA9
Windel Bouwman
parents: 340
diff changeset
37 local_loop:
899ae3aea803 First kernel run for vexpressA9
Windel Bouwman
parents: 340
diff changeset
38 B local_loop
362
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
39
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
40
375
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
41 ; Interrupt handlers:
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
42
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
43 undef_handler:
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
44 B undef_handler
19eacf4f7270 Started on memory manager
Windel Bouwman
parents: 367
diff changeset
45
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
46
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
47 ; Assembly language helpers:
362
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
48 ; Called to identify the proc:
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
49 arch_pfr0:
362
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
50 mrc p15, 0, r0, c0, c1, 0
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
51 mov pc, lr
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
52
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
53 arch_pfr1:
362
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
54 mrc p15, 0, r0, c0, c1, 1
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
55 mov pc, lr
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
56
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
57 arch_mmfr0:
362
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
58 mrc p15, 0, r0, c0, c1, 4
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
59 mov pc, lr
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
60
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
61
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
62 arch_mpuir:
362
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
63 mrc p15, 0, r0, c0, c0, 4
c05ab629976a Added CPUID for arm
Windel Bouwman
parents: 352
diff changeset
64 mov pc, lr
381
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
65
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
66
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
67 ; Memory map tables:
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
68
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
69 section mem_tables
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
70
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
71 kernel_table0:
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
72 dcd 0x000402
6df89163e114 Fix section and ldr pseudo instruction
Windel Bouwman
parents: 377
diff changeset
73