]>
git.ipfire.org Git - people/ms/u-boot.git/blob - arch/arm/mach-mvebu/arm64-common.c
8f026559c2f94d02dda4d531ddd7fcfc0668863b
2 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/system.h>
13 #include <asm/arch/cpu.h>
14 #include <asm/arch/soc.h>
15 #include <asm/armv8/mmu.h>
17 DECLARE_GLOBAL_DATA_PTR
;
20 * Not all memory is mapped in the MMU. So we need to restrict the
21 * memory size so that U-Boot does not try to access it. Also, the
22 * internal registers are located at 0xf000.0000 - 0xffff.ffff.
23 * Currently only 2GiB are mapped for system memory. This is what
24 * we pass to the U-Boot subsystem here.
26 #define USABLE_RAM_SIZE 0x80000000
28 ulong
board_get_usable_ram_top(ulong total_size
)
30 if (gd
->ram_size
> USABLE_RAM_SIZE
)
31 return USABLE_RAM_SIZE
;
37 * On ARMv8, MBus is not configured in U-Boot. To enable compilation
38 * of the already implemented drivers, lets add a dummy version of
39 * this function so that linking does not fail.
41 const struct mbus_dram_target_info
*mvebu_mbus_dram_info(void)
46 /* DRAM init code ... */
48 static const void *get_memory_reg_prop(const void *fdt
, int *lenp
)
52 offset
= fdt_path_offset(fdt
, "/memory");
56 return fdt_getprop(fdt
, offset
, "reg", lenp
);
61 const void *fdt
= gd
->fdt_blob
;
65 ac
= fdt_address_cells(fdt
, 0);
66 sc
= fdt_size_cells(fdt
, 0);
67 if (ac
< 0 || sc
< 1 || sc
> 2) {
68 printf("invalid address/size cells\n");
72 val
= get_memory_reg_prop(fdt
, &len
);
73 if (len
/ sizeof(*val
) < ac
+ sc
)
78 gd
->ram_size
= fdtdec_get_number(val
, sc
);
80 debug("DRAM size = %08lx\n", (unsigned long)gd
->ram_size
);
85 void dram_init_banksize(void)
87 const void *fdt
= gd
->fdt_blob
;
89 int ac
, sc
, cells
, len
, i
;
91 val
= get_memory_reg_prop(fdt
, &len
);
95 ac
= fdt_address_cells(fdt
, 0);
96 sc
= fdt_size_cells(fdt
, 0);
97 if (ac
< 1 || sc
> 2 || sc
< 1 || sc
> 2) {
98 printf("invalid address/size cells\n");
106 for (i
= 0; i
< CONFIG_NR_DRAM_BANKS
&& len
>= cells
;
108 gd
->bd
->bi_dram
[i
].start
= fdtdec_get_number(val
, ac
);
110 gd
->bd
->bi_dram
[i
].size
= fdtdec_get_number(val
, sc
);
113 debug("DRAM bank %d: start = %08lx, size = %08lx\n",
114 i
, (unsigned long)gd
->bd
->bi_dram
[i
].start
,
115 (unsigned long)gd
->bd
->bi_dram
[i
].size
);
119 int arch_cpu_init(void)
121 /* Nothing to do (yet) */
125 int arch_early_init_r(void)
132 * Loop over all MISC uclass drivers to call the comphy code
133 * and init all CP110 devices enabled in the DT
137 /* Call the comphy code via the MISC uclass driver */
138 ret
= uclass_get_device(UCLASS_MISC
, i
++, &dev
);
140 /* We're done, once no further CP110 device is found */
145 /* Cause the SATA device to do its early init */
146 uclass_first_device(UCLASS_AHCI
, &dev
);