1 /*
2 * Copyright (c) 2012-2014 Travis Geiselbrecht
3 *
4 * Use of this source code is governed by a MIT-style
5 * license that can be found in the LICENSE file or at
6 * https://opensource.org/licenses/MIT
7 */
8 #include <lk/err.h>
9 #include <lk/debug.h>
10 #include <assert.h>
11 #include <lk/trace.h>
12 #include <arch/arm/mmu.h>
13 #include <dev/uart.h>
14 #include <dev/interrupt/arm_gic.h>
15 #include <dev/timer/arm_cortex_a9.h>
16 #include <kernel/vm.h>
17 #include <platform.h>
18 #include <platform/alterasoc.h>
19 #include "platform_p.h"
20
21 /* initial memory mappings. parsed by start.S */
22 struct mmu_initial_mapping mmu_initial_mappings[] = {
23 /* 1GB of sdram space */
24 {
25 .phys = 0x0,
26 .virt = KERNEL_BASE,
27 .size = 1024*1024*1024,
28 .flags = 0,
29 .name = "memory"
30 },
31
32 /* HPS peripherals */
33 {
34 .phys = 0xfc000000,
35 .virt = 0xfc000000,
36 .size = 0x04000000,
37 .flags = MMU_INITIAL_MAPPING_FLAG_DEVICE,
38 .name = "hps_periphs"
39 },
40
41 /* identity map to let the boot code run */
42 {
43 .phys = 0,
44 .virt = 0,
45 .size = 1024*1024*1024,
46 .flags = MMU_INITIAL_MAPPING_TEMPORARY
47 },
48
49 /* null entry to terminate the list */
50 { 0 }
51 };
52
53 static pmm_arena_t sdram_arena = {
54 .name = "sdram",
55 .base = 0,
56 .size = MEMSIZE,
57 .flags = PMM_ARENA_FLAG_KMAP
58 };
59
platform_init_mmu_mappings(void)60 void platform_init_mmu_mappings(void) {
61 }
62
platform_early_init(void)63 void platform_early_init(void) {
64 uart_init_early();
65
66 printf("stat 0x%x\n", *REG32(0xffd05000));
67
68 /* initialize the interrupt controller */
69 arm_gic_init();
70
71 /* initialize the timer block */
72 arm_cortex_a9_timer_init(CPUPRIV_BASE, TIMER_CLOCK_FREQ);
73
74 pmm_add_arena(&sdram_arena);
75
76 /* start the secondary cpu */
77 *REG32(0xffd05010) = 0;
78 }
79
platform_init(void)80 void platform_init(void) {
81 uart_init();
82 }
83
84