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
}
static void __init
fixup_cep(struct machine_desc *desc, struct param_struct *params,
char **cmdline, struct meminfo *mi)
{
struct tag *t = (struct tag *)params;
/*
* Apparantly bootldr uses a param_struct. Groan.
*/
if (t->hdr.tag != ATAG_CORE)
convert_to_tag_list(params, 1);
if (t->hdr.tag != ATAG_CORE) {
t->hdr.tag = ATAG_CORE;
t->hdr.size = tag_size(tag_core);
t->u.core.flags = 0;
t->u.core.pagesize = PAGE_SIZE;
t->u.core.rootdev = RAMDISK_MAJOR << 8 | 0;
t = tag_next(t);
t->hdr.tag = ATAG_MEM;
t->hdr.size = tag_size(tag_mem32);
t->u.mem.start = 0xc0000000;
t->u.mem.size = 32 * 1024 * 1024;
t = tag_next(t);
t->hdr.tag = ATAG_RAMDISK;
t->hdr.size = tag_size(tag_ramdisk);
t->u.ramdisk.flags = 1;
t->u.ramdisk.size = 8192;
t->u.ramdisk.start = 0;
t = tag_next(t);
t->hdr.tag = ATAG_INITRD;
t->hdr.size = tag_size(tag_initrd);
t->u.initrd.start = 0xc0800000;
t->u.initrd.size = 3 * 1024 * 1024;
t = tag_next(t);
t->hdr.tag = ATAG_NONE;
t->hdr.size = 0;
}
}
static void __init
fixup_assabet(struct machine_desc *desc, struct param_struct *params,
char **cmdline, struct meminfo *mi)
{
struct tag *t = (struct tag *)params;
/* This must be done before any call to machine_has_neponset() */
map_sa1100_gpio_regs();
get_assabet_scr();
if (machine_has_neponset())
printk("Neponset expansion board detected\n");
/*
* Apparantly bootldr uses a param_struct. Groan.
*/
if (t->hdr.tag != ATAG_CORE)
convert_to_tag_list(params, 1);
if (t->hdr.tag != ATAG_CORE) {
t->hdr.tag = ATAG_CORE;
t->hdr.size = tag_size(tag_core);
t->u.core.flags = 0;
t->u.core.pagesize = PAGE_SIZE;
t->u.core.rootdev = RAMDISK_MAJOR << 8 | 0;
t = tag_next(t);
t->hdr.tag = ATAG_MEM;
t->hdr.size = tag_size(tag_mem32);
t->u.mem.start = 0xc0000000;
t->u.mem.size = 32 * 1024 * 1024;
t = tag_next(t);
/*
* Note that Neponset RAM is slower...
* and still untested.
* This would be a candidate for
* _real_ NUMA support.
*/
if (machine_has_neponset() && 0) {
t->hdr.tag = ATAG_MEM;
t->hdr.size = tag_size(tag_mem32);
t->u.mem.start = 0xd0000000;
t->u.mem.size = 32 * 1024 * 1024;
t = tag_next(t);
}
t->hdr.tag = ATAG_RAMDISK;
t->hdr.size = tag_size(tag_ramdisk);
t->u.ramdisk.flags = 1;
t->u.ramdisk.size = 8192;
t->u.ramdisk.start = 0;
t = tag_next(t);
t->hdr.tag = ATAG_INITRD;
t->hdr.size = tag_size(tag_initrd);
t->u.initrd.start = 0xc0800000;
t->u.initrd.size = 3 * 1024 * 1024;
t = tag_next(t);
t->hdr.tag = ATAG_NONE;
t->hdr.size = 0;
}
}
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
}
