1 // SPDX-License-Identifier: GPL-2.0
4 * David Feng <fenghua@phytium.com.cn>
5 * Sharma Bhupesh <bhupesh.sharma@freescale.com>
7 * (C) 2020 EPAM Systems Inc
18 #include <asm/armv8/mmu.h>
20 #include <asm/xen/hypercall.h>
21 #include <asm/xen/system.h>
23 #include <linux/compiler.h>
25 #include <xen/gnttab.h>
28 DECLARE_GLOBAL_DATA_PTR;
36 * Use fdt provided by Xen: according to
37 * https://www.kernel.org/doc/Documentation/arm64/booting.txt
38 * x0 is the physical address of the device tree blob (dtb) in system RAM.
39 * This is stored in rom_pointer during low level init.
41 void *board_fdt_blob_setup(void)
43 if (fdt_magic(rom_pointer[0]) != FDT_MAGIC)
45 return (void *)rom_pointer[0];
48 #define MAX_MEM_MAP_REGIONS 5
49 static struct mm_region xen_mem_map[MAX_MEM_MAP_REGIONS];
50 struct mm_region *mem_map = xen_mem_map;
52 static int get_next_memory_node(const void *blob, int mem)
55 mem = fdt_node_offset_by_prop_value(blob, mem,
56 "device_type", "memory", 7);
57 } while (!fdtdec_get_is_enabled(blob, mem));
62 static int setup_mem_map(void)
64 int i = 0, ret, mem, reg = 0;
65 struct fdt_resource res;
66 const void *blob = gd->fdt_blob;
68 phys_addr_t gnttab_base;
69 phys_size_t gnttab_sz;
72 * Add "magic" region which is used by Xen to provide some essentials
73 * for the guest: we need console and xenstore.
75 ret = hvm_get_parameter_maintain_dcache(HVM_PARAM_CONSOLE_PFN, &gfn);
77 printf("%s: Can't get HVM_PARAM_CONSOLE_PFN, ret %d\n",
82 xen_mem_map[i].virt = PFN_PHYS(gfn);
83 xen_mem_map[i].phys = PFN_PHYS(gfn);
84 xen_mem_map[i].size = PAGE_SIZE;
85 xen_mem_map[i].attrs = (PTE_BLOCK_MEMTYPE(MT_NORMAL) |
86 PTE_BLOCK_INNER_SHARE);
89 ret = hvm_get_parameter_maintain_dcache(HVM_PARAM_STORE_PFN, &gfn);
91 printf("%s: Can't get HVM_PARAM_STORE_PFN, ret %d\n",
96 xen_mem_map[i].virt = PFN_PHYS(gfn);
97 xen_mem_map[i].phys = PFN_PHYS(gfn);
98 xen_mem_map[i].size = PAGE_SIZE;
99 xen_mem_map[i].attrs = (PTE_BLOCK_MEMTYPE(MT_NORMAL) |
100 PTE_BLOCK_INNER_SHARE);
103 /* Get Xen's suggested physical page assignments for the grant table. */
104 get_gnttab_base(&gnttab_base, &gnttab_sz);
106 xen_mem_map[i].virt = gnttab_base;
107 xen_mem_map[i].phys = gnttab_base;
108 xen_mem_map[i].size = gnttab_sz;
109 xen_mem_map[i].attrs = (PTE_BLOCK_MEMTYPE(MT_NORMAL) |
110 PTE_BLOCK_INNER_SHARE);
113 mem = get_next_memory_node(blob, -1);
115 printf("%s: Missing /memory node\n", __func__);
119 for (; i < MAX_MEM_MAP_REGIONS; i++) {
120 ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
121 if (ret == -FDT_ERR_NOTFOUND) {
123 mem = get_next_memory_node(blob, mem);
124 if (mem == -FDT_ERR_NOTFOUND)
127 ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
128 if (ret == -FDT_ERR_NOTFOUND)
132 printf("No reg property for memory node\n");
136 xen_mem_map[i].virt = (phys_addr_t)res.start;
137 xen_mem_map[i].phys = (phys_addr_t)res.start;
138 xen_mem_map[i].size = (phys_size_t)(res.end - res.start + 1);
139 xen_mem_map[i].attrs = (PTE_BLOCK_MEMTYPE(MT_NORMAL) |
140 PTE_BLOCK_INNER_SHARE);
145 void enable_caches(void)
147 /* Re-setup the memory map as BSS gets cleared after relocation. */
153 /* Read memory settings from the Xen provided device tree. */
158 ret = fdtdec_setup_mem_size_base();
161 /* Setup memory map, so MMU page table size can be estimated. */
162 return setup_mem_map();
165 int dram_init_banksize(void)
167 return fdtdec_setup_memory_banksize();
171 * Board specific reset that is system reset.
173 void reset_cpu(ulong addr)
177 int ft_system_setup(void *blob, struct bd_info *bd)
182 int ft_board_setup(void *blob, struct bd_info *bd)
187 int board_early_init_f(void)
192 int print_cpuinfo(void)
194 printf("Xen virtual CPU\n");
198 void board_cleanup_before_linux(void)