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[u-boot] / arch / arm / cpu / armv8 / zynqmp / spl.c
1 /*
2  * Copyright 2015 - 2016 Xilinx, Inc.
3  *
4  * Michal Simek <michal.simek@xilinx.com>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <debug_uart.h>
11 #include <spl.h>
12
13 #include <asm/io.h>
14 #include <asm/spl.h>
15 #include <asm/arch/hardware.h>
16 #include <asm/arch/sys_proto.h>
17
18 void board_init_f(ulong dummy)
19 {
20         psu_init();
21         board_early_init_r();
22
23 #ifdef CONFIG_DEBUG_UART
24         /* Uart debug for sure */
25         debug_uart_init();
26         puts("Debug uart enabled\n"); /* or printch() */
27 #endif
28         /* Delay is required for clocks to be propagated */
29         udelay(1000000);
30
31         /* Clear the BSS */
32         memset(__bss_start, 0, __bss_end - __bss_start);
33
34         /* No need to call timer init - it is empty for ZynqMP */
35         board_init_r(NULL, 0);
36 }
37
38 #ifdef CONFIG_SPL_BOARD_INIT
39 void spl_board_init(void)
40 {
41         preloader_console_init();
42         board_init();
43 }
44 #endif
45
46 u32 spl_boot_device(void)
47 {
48         u32 reg = 0;
49         u8 bootmode;
50
51         reg = readl(&crlapb_base->boot_mode);
52         bootmode = reg & BOOT_MODES_MASK;
53
54         switch (bootmode) {
55         case JTAG_MODE:
56                 return BOOT_DEVICE_RAM;
57 #ifdef CONFIG_SPL_MMC_SUPPORT
58         case EMMC_MODE:
59         case SD_MODE:
60         case SD_MODE1:
61                 return BOOT_DEVICE_MMC1;
62 #endif
63         default:
64                 printf("Invalid Boot Mode:0x%x\n", bootmode);
65                 break;
66         }
67
68         return 0;
69 }
70
71 u32 spl_boot_mode(void)
72 {
73         switch (spl_boot_device()) {
74         case BOOT_DEVICE_RAM:
75                 return 0;
76         case BOOT_DEVICE_MMC1:
77                 return MMCSD_MODE_FS;
78         default:
79                 puts("spl: error: unsupported device\n");
80                 hang();
81         }
82 }
83
84 __weak void psu_init(void)
85 {
86          /*
87           * This function is overridden by the one in
88           * board/xilinx/zynqmp/(platform)/psu_init_gpl.c, if it exists.
89           */
90 }
91
92 #ifdef CONFIG_SPL_OS_BOOT
93 int spl_start_uboot(void)
94 {
95         return 0;
96 }
97 #endif
98
99 #ifdef CONFIG_SPL_LOAD_FIT
100 int board_fit_config_name_match(const char *name)
101 {
102         /* Just empty function now - can't decide what to choose */
103         debug("%s: %s\n", __func__, name);
104
105         return 0;
106 }
107 #endif