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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2016 Beniamino Galvani <[email protected]>
4  * (C) Copyright 2018 Neil Armstrong <[email protected]>
5  */
6
7 #include <common.h>
8 #include <init.h>
9 #include <net.h>
10 #include <asm/arch/boot.h>
11 #include <asm/arch/eth.h>
12 #include <asm/arch/gx.h>
13 #include <asm/arch/mem.h>
14 #include <asm/arch/meson-vpu.h>
15 #include <asm/global_data.h>
16 #include <asm/io.h>
17 #include <asm/armv8/mmu.h>
18 #include <linux/printk.h>
19 #include <linux/sizes.h>
20
21 DECLARE_GLOBAL_DATA_PTR;
22
23 int meson_get_boot_device(void)
24 {
25         return readl(GX_AO_SEC_GP_CFG0) & GX_AO_BOOT_DEVICE;
26 }
27
28 /* Configure the reserved memory zones exported by the secure registers
29  * into EFI and DTB reserved memory entries.
30  */
31 void meson_init_reserved_memory(void *fdt)
32 {
33         u64 bl31_size, bl31_start;
34         u64 bl32_size, bl32_start;
35         u32 reg;
36
37         /*
38          * Get ARM Trusted Firmware reserved memory zones in :
39          * - AO_SEC_GP_CFG3: bl32 & bl31 size in KiB, can be 0
40          * - AO_SEC_GP_CFG5: bl31 physical start address, can be NULL
41          * - AO_SEC_GP_CFG4: bl32 physical start address, can be NULL
42          */
43         reg = readl(GX_AO_SEC_GP_CFG3);
44
45         bl31_size = ((reg & GX_AO_BL31_RSVMEM_SIZE_MASK)
46                         >> GX_AO_BL31_RSVMEM_SIZE_SHIFT) * SZ_1K;
47         bl32_size = (reg & GX_AO_BL32_RSVMEM_SIZE_MASK) * SZ_1K;
48
49         bl31_start = readl(GX_AO_SEC_GP_CFG5);
50         bl32_start = readl(GX_AO_SEC_GP_CFG4);
51
52         /*
53          * Early Meson GX Firmware revisions did not provide the reserved
54          * memory zones in the registers, keep fixed memory zone handling.
55          */
56         if (IS_ENABLED(CONFIG_MESON_GX) &&
57             !reg && !bl31_start && !bl32_start) {
58                 bl31_start = 0x10000000;
59                 bl31_size = 0x200000;
60         }
61
62         /* Add first 16MiB reserved zone */
63         meson_board_add_reserved_memory(fdt, 0, GX_FIRMWARE_MEM_SIZE);
64
65         /* Add BL31 reserved zone */
66         if (bl31_start && bl31_size)
67                 meson_board_add_reserved_memory(fdt, bl31_start, bl31_size);
68
69         /* Add BL32 reserved zone */
70         if (bl32_start && bl32_size)
71                 meson_board_add_reserved_memory(fdt, bl32_start, bl32_size);
72
73 #if defined(CONFIG_VIDEO_MESON)
74         meson_vpu_rsv_fb(fdt);
75 #endif
76 }
77
78 phys_size_t get_effective_memsize(void)
79 {
80         /* Size is reported in MiB, convert it in bytes */
81         return ((readl(GX_AO_SEC_GP_CFG0) & GX_AO_MEM_SIZE_MASK)
82                         >> GX_AO_MEM_SIZE_SHIFT) * SZ_1M;
83 }
84
85 static struct mm_region gx_mem_map[] = {
86         {
87                 .virt = 0x0UL,
88                 .phys = 0x0UL,
89                 .size = 0xc0000000UL,
90                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
91                          PTE_BLOCK_INNER_SHARE
92         }, {
93                 .virt = 0xc0000000UL,
94                 .phys = 0xc0000000UL,
95                 .size = 0x30000000UL,
96                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
97                          PTE_BLOCK_NON_SHARE |
98                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
99         }, {
100                 /* List terminator */
101                 0,
102         }
103 };
104
105 struct mm_region *mem_map = gx_mem_map;
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