struct machine_desc * __init setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr) { struct tag *tags = (struct tag *)&default_tags; struct machine_desc *mdesc = NULL, *p; char *from = default_command_line; default_tags.mem.start = PHYS_OFFSET; /* * locate machine in the list of supported machines. */ for_each_machine_desc(p) if (machine_nr == p->nr) { printk("Machine: %s\n", p->name); mdesc = p; break; } if (!mdesc) { early_print("\nError: unrecognized/unsupported machine ID" " (r1 = 0x%08x).\n\n", machine_nr); dump_machine_table(); /* does not return */ } if (__atags_pointer) tags = phys_to_virt(__atags_pointer); else if (mdesc->atag_offset) tags = (void *)(PAGE_OFFSET + mdesc->atag_offset); #if defined(CONFIG_DEPRECATED_PARAM_STRUCT) /* * If we have the old style parameters, convert them to * a tag list. */ if (tags->hdr.tag != ATAG_CORE) convert_to_tag_list(tags); #endif if (tags->hdr.tag != ATAG_CORE) { early_print("Warning: Neither atags nor dtb found\n"); tags = (struct tag *)&default_tags; } if (mdesc->fixup) mdesc->fixup(tags, &from, &meminfo); if (tags->hdr.tag == ATAG_CORE) { if (meminfo.nr_banks != 0) squash_mem_tags(tags); save_atags(tags); parse_tags(tags); } /* parse_early_param needs a boot_command_line */ strlcpy(boot_command_line, from, COMMAND_LINE_SIZE); return mdesc; }
void __init setup_arch(char **cmdline_p) { struct tag *tags = (struct tag *)&init_tags; char *from = default_command_line; setup_processor(); if(machine_arch_type == MACH_TYPE_A5K) machine_name = "A5000"; else if(machine_arch_type == MACH_TYPE_ARCHIMEDES) machine_name = "Archimedes"; else machine_name = "UNKNOWN"; //FIXME - the tag struct is always copied here but this is a block // of RAM that is accidentally reserved along with video RAM. perhaps // it would be a good idea to explicitly reserve this? tags = (struct tag *)0x0207c000; /* * If we have the old style parameters, convert them to * a tag list. */ if (tags->hdr.tag != ATAG_CORE) convert_to_tag_list(tags); if (tags->hdr.tag != ATAG_CORE) tags = (struct tag *)&init_tags; if (tags->hdr.tag == ATAG_CORE) { if (meminfo.nr_banks != 0) squash_mem_tags(tags); parse_tags(tags); } init_mm.start_code = (unsigned long) &_text; #ifndef CONFIG_XIP_KERNEL init_mm.end_code = (unsigned long) &_etext; #else init_mm.end_code = (unsigned long) &_endtext; init_mm.start_data = (unsigned long) &_sdata; #endif init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) &_end; memcpy(boot_command_line, from, COMMAND_LINE_SIZE); boot_command_line[COMMAND_LINE_SIZE-1] = '\0'; parse_cmdline(&meminfo, cmdline_p, from); bootmem_init(&meminfo); paging_init(&meminfo); request_standard_resources(&meminfo); #ifdef CONFIG_VT #if defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif #endif }
void __init setup_arch(char **cmdline_p) { struct tag *tags = (struct tag *)&init_tags; struct machine_desc *mdesc; char *from = default_command_line; ROOT_DEV = MKDEV(0, 255); setup_processor(); mdesc = setup_machine(machine_arch_type); machine_name = mdesc->name; if (mdesc->soft_reboot) reboot_setup("s"); if (mdesc->param_offset) tags = phys_to_virt(mdesc->param_offset); /* * Do the machine-specific fixups before we parse the * parameters or tags. */ if (mdesc->fixup) mdesc->fixup(mdesc, (struct param_struct *)tags, &from, &meminfo); /* * If we have the old style parameters, convert them to * a tag list. */ if (tags->hdr.tag != ATAG_CORE) convert_to_tag_list(tags); if (tags->hdr.tag == ATAG_CORE) { if (meminfo.nr_banks != 0) squash_mem_tags(tags); parse_tags(tags); } if (meminfo.nr_banks == 0) { meminfo.nr_banks = 1; meminfo.bank[0].start = PHYS_OFFSET; meminfo.bank[0].size = MEM_SIZE; } init_mm.start_code = (unsigned long) &_text; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) &_end; memcpy(saved_command_line, from, COMMAND_LINE_SIZE); saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; parse_cmdline(&meminfo, cmdline_p, from); bootmem_init(&meminfo); paging_init(&meminfo, mdesc); request_standard_resources(&meminfo, mdesc); /* * Set up various architecture-specific pointers */ init_arch_irq = mdesc->init_irq; #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) conswitchp = &vga_con; #elif defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif #endif }