mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 19:05:18 +07:00
7480e0aabd
Add a new pseudo-board, within the existing SH boards/machine-vectors framework, which does not represent any actual hardware but instead requires all hardware to be described by the device tree blob provided by the boot loader. Changes made are thus non-invasive and do not risk breaking support for legacy boards. New hardware, including the open-hardware J2 and associated SoC devices, will use device free from the outset. Legacy SH boards can transition to device tree once all their hardware has device tree bindings, driver support for device tree, and a dts file for the board. It is intented that, once all boards are supported in the new framework, the existing machine-vectors framework should be removed and the new device tree setup code integrated directly. Signed-off-by: Rich Felker <dalias@libc.org>
352 lines
8.4 KiB
C
352 lines
8.4 KiB
C
/*
|
|
* arch/sh/kernel/setup.c
|
|
*
|
|
* This file handles the architecture-dependent parts of initialization
|
|
*
|
|
* Copyright (C) 1999 Niibe Yutaka
|
|
* Copyright (C) 2002 - 2010 Paul Mundt
|
|
*/
|
|
#include <linux/screen_info.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/console.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/nodemask.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/kexec.h>
|
|
#include <linux/module.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/err.h>
|
|
#include <linux/crash_dump.h>
|
|
#include <linux/mmzone.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/io.h>
|
|
#include <asm/page.h>
|
|
#include <asm/elf.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/clock.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/mmzone.h>
|
|
#include <asm/sparsemem.h>
|
|
|
|
/*
|
|
* Initialize loops_per_jiffy as 10000000 (1000MIPS).
|
|
* This value will be used at the very early stage of serial setup.
|
|
* The bigger value means no problem.
|
|
*/
|
|
struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
|
|
[0] = {
|
|
.type = CPU_SH_NONE,
|
|
.family = CPU_FAMILY_UNKNOWN,
|
|
.loops_per_jiffy = 10000000,
|
|
.phys_bits = MAX_PHYSMEM_BITS,
|
|
},
|
|
};
|
|
EXPORT_SYMBOL(cpu_data);
|
|
|
|
/*
|
|
* The machine vector. First entry in .machvec.init, or clobbered by
|
|
* sh_mv= on the command line, prior to .machvec.init teardown.
|
|
*/
|
|
struct sh_machine_vector sh_mv = { .mv_name = "generic", };
|
|
EXPORT_SYMBOL(sh_mv);
|
|
|
|
#ifdef CONFIG_VT
|
|
struct screen_info screen_info;
|
|
#endif
|
|
|
|
extern int root_mountflags;
|
|
|
|
#define RAMDISK_IMAGE_START_MASK 0x07FF
|
|
#define RAMDISK_PROMPT_FLAG 0x8000
|
|
#define RAMDISK_LOAD_FLAG 0x4000
|
|
|
|
static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
|
|
|
|
static struct resource code_resource = {
|
|
.name = "Kernel code",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct resource data_resource = {
|
|
.name = "Kernel data",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct resource bss_resource = {
|
|
.name = "Kernel bss",
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_MEM,
|
|
};
|
|
|
|
unsigned long memory_start;
|
|
EXPORT_SYMBOL(memory_start);
|
|
unsigned long memory_end = 0;
|
|
EXPORT_SYMBOL(memory_end);
|
|
unsigned long memory_limit = 0;
|
|
|
|
static struct resource mem_resources[MAX_NUMNODES];
|
|
|
|
int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
|
|
|
|
static int __init early_parse_mem(char *p)
|
|
{
|
|
if (!p)
|
|
return 1;
|
|
|
|
memory_limit = PAGE_ALIGN(memparse(p, &p));
|
|
|
|
pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
|
|
|
|
return 0;
|
|
}
|
|
early_param("mem", early_parse_mem);
|
|
|
|
void __init check_for_initrd(void)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
unsigned long start, end;
|
|
|
|
/*
|
|
* Check for the rare cases where boot loaders adhere to the boot
|
|
* ABI.
|
|
*/
|
|
if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
|
|
goto disable;
|
|
|
|
start = INITRD_START + __MEMORY_START;
|
|
end = start + INITRD_SIZE;
|
|
|
|
if (unlikely(end <= start))
|
|
goto disable;
|
|
if (unlikely(start & ~PAGE_MASK)) {
|
|
pr_err("initrd must be page aligned\n");
|
|
goto disable;
|
|
}
|
|
|
|
if (unlikely(start < __MEMORY_START)) {
|
|
pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
|
|
start, __MEMORY_START);
|
|
goto disable;
|
|
}
|
|
|
|
if (unlikely(end > memblock_end_of_DRAM())) {
|
|
pr_err("initrd extends beyond end of memory "
|
|
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
|
|
end, (unsigned long)memblock_end_of_DRAM());
|
|
goto disable;
|
|
}
|
|
|
|
/*
|
|
* If we got this far in spite of the boot loader's best efforts
|
|
* to the contrary, assume we actually have a valid initrd and
|
|
* fix up the root dev.
|
|
*/
|
|
ROOT_DEV = Root_RAM0;
|
|
|
|
/*
|
|
* Address sanitization
|
|
*/
|
|
initrd_start = (unsigned long)__va(start);
|
|
initrd_end = initrd_start + INITRD_SIZE;
|
|
|
|
memblock_reserve(__pa(initrd_start), INITRD_SIZE);
|
|
|
|
return;
|
|
|
|
disable:
|
|
pr_info("initrd disabled\n");
|
|
initrd_start = initrd_end = 0;
|
|
#endif
|
|
}
|
|
|
|
#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
|
|
void calibrate_delay(void)
|
|
{
|
|
struct clk *clk = clk_get(NULL, "cpu_clk");
|
|
|
|
if (IS_ERR(clk))
|
|
panic("Need a sane CPU clock definition!");
|
|
|
|
loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
|
|
|
|
printk(KERN_INFO "Calibrating delay loop (skipped)... "
|
|
"%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
|
|
loops_per_jiffy/(500000/HZ),
|
|
(loops_per_jiffy/(5000/HZ)) % 100,
|
|
loops_per_jiffy);
|
|
}
|
|
#endif
|
|
|
|
void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
|
|
unsigned long end_pfn)
|
|
{
|
|
struct resource *res = &mem_resources[nid];
|
|
unsigned long start, end;
|
|
|
|
WARN_ON(res->name); /* max one active range per node for now */
|
|
|
|
start = start_pfn << PAGE_SHIFT;
|
|
end = end_pfn << PAGE_SHIFT;
|
|
|
|
res->name = "System RAM";
|
|
res->start = start;
|
|
res->end = end - 1;
|
|
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
|
|
|
|
if (request_resource(&iomem_resource, res)) {
|
|
pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
|
|
start_pfn, end_pfn);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We don't know which RAM region contains kernel data or
|
|
* the reserved crashkernel region, so try it repeatedly
|
|
* and let the resource manager test it.
|
|
*/
|
|
request_resource(res, &code_resource);
|
|
request_resource(res, &data_resource);
|
|
request_resource(res, &bss_resource);
|
|
#ifdef CONFIG_KEXEC
|
|
request_resource(res, &crashk_res);
|
|
#endif
|
|
|
|
/*
|
|
* Also make sure that there is a PMB mapping that covers this
|
|
* range before we attempt to activate it, to avoid reset by MMU.
|
|
* We can hit this path with NUMA or memory hot-add.
|
|
*/
|
|
pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
|
|
PAGE_KERNEL);
|
|
|
|
memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn),
|
|
&memblock.memory, nid);
|
|
}
|
|
|
|
void __init __weak plat_early_device_setup(void)
|
|
{
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
void __ref sh_fdt_init(phys_addr_t dt_phys)
|
|
{
|
|
static int done = 0;
|
|
void *dt_virt;
|
|
|
|
/* Avoid calling an __init function on secondary cpus. */
|
|
if (done) return;
|
|
|
|
dt_virt = phys_to_virt(dt_phys);
|
|
|
|
if (!dt_virt || !early_init_dt_scan(dt_virt)) {
|
|
pr_crit("Error: invalid device tree blob"
|
|
" at physical address %p\n", (void *)dt_phys);
|
|
|
|
while (true)
|
|
cpu_relax();
|
|
}
|
|
|
|
done = 1;
|
|
}
|
|
#endif
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
enable_mmu();
|
|
|
|
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
|
|
|
|
printk(KERN_NOTICE "Boot params:\n"
|
|
"... MOUNT_ROOT_RDONLY - %08lx\n"
|
|
"... RAMDISK_FLAGS - %08lx\n"
|
|
"... ORIG_ROOT_DEV - %08lx\n"
|
|
"... LOADER_TYPE - %08lx\n"
|
|
"... INITRD_START - %08lx\n"
|
|
"... INITRD_SIZE - %08lx\n",
|
|
MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
|
|
ORIG_ROOT_DEV, LOADER_TYPE,
|
|
INITRD_START, INITRD_SIZE);
|
|
|
|
#ifdef CONFIG_BLK_DEV_RAM
|
|
rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
|
|
rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
|
|
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
|
|
#endif
|
|
|
|
if (!MOUNT_ROOT_RDONLY)
|
|
root_mountflags &= ~MS_RDONLY;
|
|
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;
|
|
|
|
code_resource.start = virt_to_phys(_text);
|
|
code_resource.end = virt_to_phys(_etext)-1;
|
|
data_resource.start = virt_to_phys(_etext);
|
|
data_resource.end = virt_to_phys(_edata)-1;
|
|
bss_resource.start = virt_to_phys(__bss_start);
|
|
bss_resource.end = virt_to_phys(__bss_stop)-1;
|
|
|
|
#ifdef CONFIG_CMDLINE_OVERWRITE
|
|
strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
|
|
#else
|
|
strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
|
|
#ifdef CONFIG_CMDLINE_EXTEND
|
|
strlcat(command_line, " ", sizeof(command_line));
|
|
strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
|
|
#endif
|
|
#endif
|
|
|
|
/* Save unparsed command line copy for /proc/cmdline */
|
|
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
|
|
*cmdline_p = command_line;
|
|
|
|
parse_early_param();
|
|
|
|
plat_early_device_setup();
|
|
|
|
sh_mv_setup();
|
|
|
|
/* Let earlyprintk output early console messages */
|
|
early_platform_driver_probe("earlyprintk", 1, 1);
|
|
|
|
paging_init();
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
|
|
/* Perform the machine specific initialisation */
|
|
if (likely(sh_mv.mv_setup))
|
|
sh_mv.mv_setup(cmdline_p);
|
|
|
|
plat_smp_setup();
|
|
}
|
|
|
|
/* processor boot mode configuration */
|
|
int generic_mode_pins(void)
|
|
{
|
|
pr_warning("generic_mode_pins(): missing mode pin configuration\n");
|
|
return 0;
|
|
}
|
|
|
|
int test_mode_pin(int pin)
|
|
{
|
|
return sh_mv.mv_mode_pins() & pin;
|
|
}
|