mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 09:59:32 +00:00
![Randy Dunlap](/assets/img/avatar_default.png)
commit1e6ae0e46e
upstream. Correct a typo/pasto: setnocoherentio() should set dma_default_coherent to false, not true. Fixes:14ac09a65e
("MIPS: refactor the runtime coherent vs noncoherent DMA indicators") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: linux-mips@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
811 lines
20 KiB
C
811 lines
20 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1995 Linus Torvalds
|
|
* Copyright (C) 1995 Waldorf Electronics
|
|
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle
|
|
* Copyright (C) 1996 Stoned Elipot
|
|
* Copyright (C) 1999 Silicon Graphics, Inc.
|
|
* Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/export.h>
|
|
#include <linux/screen_info.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/console.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/kexec.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/device.h>
|
|
#include <linux/dma-map-ops.h>
|
|
#include <linux/decompress/generic.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/crash_dump.h>
|
|
|
|
#include <asm/addrspace.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/bugs.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/cdmm.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/debug.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/smp-ops.h>
|
|
#include <asm/prom.h>
|
|
|
|
#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
|
|
char __section(".appended_dtb") __appended_dtb[0x100000];
|
|
#endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
|
|
|
|
struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
|
|
|
|
EXPORT_SYMBOL(cpu_data);
|
|
|
|
#ifdef CONFIG_VT
|
|
struct screen_info screen_info;
|
|
#endif
|
|
|
|
/*
|
|
* Setup information
|
|
*
|
|
* These are initialized so they are in the .data section
|
|
*/
|
|
unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
|
|
|
|
EXPORT_SYMBOL(mips_machtype);
|
|
|
|
static char __initdata command_line[COMMAND_LINE_SIZE];
|
|
char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
|
|
|
|
#ifdef CONFIG_CMDLINE_BOOL
|
|
static const char builtin_cmdline[] __initconst = CONFIG_CMDLINE;
|
|
#else
|
|
static const char builtin_cmdline[] __initconst = "";
|
|
#endif
|
|
|
|
/*
|
|
* mips_io_port_base is the begin of the address space to which x86 style
|
|
* I/O ports are mapped.
|
|
*/
|
|
unsigned long mips_io_port_base = -1;
|
|
EXPORT_SYMBOL(mips_io_port_base);
|
|
|
|
static struct resource code_resource = { .name = "Kernel code", };
|
|
static struct resource data_resource = { .name = "Kernel data", };
|
|
static struct resource bss_resource = { .name = "Kernel bss", };
|
|
|
|
unsigned long __kaslr_offset __ro_after_init;
|
|
EXPORT_SYMBOL(__kaslr_offset);
|
|
|
|
static void *detect_magic __initdata = detect_memory_region;
|
|
|
|
#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
|
|
unsigned long ARCH_PFN_OFFSET;
|
|
EXPORT_SYMBOL(ARCH_PFN_OFFSET);
|
|
#endif
|
|
|
|
void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
|
|
{
|
|
void *dm = &detect_magic;
|
|
phys_addr_t size;
|
|
|
|
for (size = sz_min; size < sz_max; size <<= 1) {
|
|
if (!memcmp(dm, dm + size, sizeof(detect_magic)))
|
|
break;
|
|
}
|
|
|
|
pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
|
|
((unsigned long long) size) / SZ_1M,
|
|
(unsigned long long) start,
|
|
((unsigned long long) sz_min) / SZ_1M,
|
|
((unsigned long long) sz_max) / SZ_1M);
|
|
|
|
memblock_add(start, size);
|
|
}
|
|
|
|
/*
|
|
* Manage initrd
|
|
*/
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
|
|
static int __init rd_start_early(char *p)
|
|
{
|
|
unsigned long start = memparse(p, &p);
|
|
|
|
#ifdef CONFIG_64BIT
|
|
/* Guess if the sign extension was forgotten by bootloader */
|
|
if (start < XKPHYS)
|
|
start = (int)start;
|
|
#endif
|
|
initrd_start = start;
|
|
initrd_end += start;
|
|
return 0;
|
|
}
|
|
early_param("rd_start", rd_start_early);
|
|
|
|
static int __init rd_size_early(char *p)
|
|
{
|
|
initrd_end += memparse(p, &p);
|
|
return 0;
|
|
}
|
|
early_param("rd_size", rd_size_early);
|
|
|
|
/* it returns the next free pfn after initrd */
|
|
static unsigned long __init init_initrd(void)
|
|
{
|
|
unsigned long end;
|
|
|
|
/*
|
|
* Board specific code or command line parser should have
|
|
* already set up initrd_start and initrd_end. In these cases
|
|
* perfom sanity checks and use them if all looks good.
|
|
*/
|
|
if (!initrd_start || initrd_end <= initrd_start)
|
|
goto disable;
|
|
|
|
if (initrd_start & ~PAGE_MASK) {
|
|
pr_err("initrd start must be page aligned\n");
|
|
goto disable;
|
|
}
|
|
if (initrd_start < PAGE_OFFSET) {
|
|
pr_err("initrd start < PAGE_OFFSET\n");
|
|
goto disable;
|
|
}
|
|
|
|
/*
|
|
* Sanitize initrd addresses. For example firmware
|
|
* can't guess if they need to pass them through
|
|
* 64-bits values if the kernel has been built in pure
|
|
* 32-bit. We need also to switch from KSEG0 to XKPHYS
|
|
* addresses now, so the code can now safely use __pa().
|
|
*/
|
|
end = __pa(initrd_end);
|
|
initrd_end = (unsigned long)__va(end);
|
|
initrd_start = (unsigned long)__va(__pa(initrd_start));
|
|
|
|
ROOT_DEV = Root_RAM0;
|
|
return PFN_UP(end);
|
|
disable:
|
|
initrd_start = 0;
|
|
initrd_end = 0;
|
|
return 0;
|
|
}
|
|
|
|
/* In some conditions (e.g. big endian bootloader with a little endian
|
|
kernel), the initrd might appear byte swapped. Try to detect this and
|
|
byte swap it if needed. */
|
|
static void __init maybe_bswap_initrd(void)
|
|
{
|
|
#if defined(CONFIG_CPU_CAVIUM_OCTEON)
|
|
u64 buf;
|
|
|
|
/* Check for CPIO signature */
|
|
if (!memcmp((void *)initrd_start, "070701", 6))
|
|
return;
|
|
|
|
/* Check for compressed initrd */
|
|
if (decompress_method((unsigned char *)initrd_start, 8, NULL))
|
|
return;
|
|
|
|
/* Try again with a byte swapped header */
|
|
buf = swab64p((u64 *)initrd_start);
|
|
if (!memcmp(&buf, "070701", 6) ||
|
|
decompress_method((unsigned char *)(&buf), 8, NULL)) {
|
|
unsigned long i;
|
|
|
|
pr_info("Byteswapped initrd detected\n");
|
|
for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8)
|
|
swab64s((u64 *)i);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void __init finalize_initrd(void)
|
|
{
|
|
unsigned long size = initrd_end - initrd_start;
|
|
|
|
if (size == 0) {
|
|
printk(KERN_INFO "Initrd not found or empty");
|
|
goto disable;
|
|
}
|
|
if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
|
|
printk(KERN_ERR "Initrd extends beyond end of memory");
|
|
goto disable;
|
|
}
|
|
|
|
maybe_bswap_initrd();
|
|
|
|
memblock_reserve(__pa(initrd_start), size);
|
|
initrd_below_start_ok = 1;
|
|
|
|
pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
|
|
initrd_start, size);
|
|
return;
|
|
disable:
|
|
printk(KERN_CONT " - disabling initrd\n");
|
|
initrd_start = 0;
|
|
initrd_end = 0;
|
|
}
|
|
|
|
#else /* !CONFIG_BLK_DEV_INITRD */
|
|
|
|
static unsigned long __init init_initrd(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#define finalize_initrd() do {} while (0)
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Initialize the bootmem allocator. It also setup initrd related data
|
|
* if needed.
|
|
*/
|
|
#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA))
|
|
|
|
static void __init bootmem_init(void)
|
|
{
|
|
init_initrd();
|
|
finalize_initrd();
|
|
}
|
|
|
|
#else /* !CONFIG_SGI_IP27 */
|
|
|
|
static void __init bootmem_init(void)
|
|
{
|
|
phys_addr_t ramstart, ramend;
|
|
unsigned long start, end;
|
|
int i;
|
|
|
|
ramstart = memblock_start_of_DRAM();
|
|
ramend = memblock_end_of_DRAM();
|
|
|
|
/*
|
|
* Sanity check any INITRD first. We don't take it into account
|
|
* for bootmem setup initially, rely on the end-of-kernel-code
|
|
* as our memory range starting point. Once bootmem is inited we
|
|
* will reserve the area used for the initrd.
|
|
*/
|
|
init_initrd();
|
|
|
|
/* Reserve memory occupied by kernel. */
|
|
memblock_reserve(__pa_symbol(&_text),
|
|
__pa_symbol(&_end) - __pa_symbol(&_text));
|
|
|
|
/* max_low_pfn is not a number of pages but the end pfn of low mem */
|
|
|
|
#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
|
|
ARCH_PFN_OFFSET = PFN_UP(ramstart);
|
|
#else
|
|
/*
|
|
* Reserve any memory between the start of RAM and PHYS_OFFSET
|
|
*/
|
|
if (ramstart > PHYS_OFFSET)
|
|
memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
|
|
|
|
if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) {
|
|
pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
|
|
(unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)),
|
|
(unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET));
|
|
}
|
|
#endif
|
|
|
|
min_low_pfn = ARCH_PFN_OFFSET;
|
|
max_pfn = PFN_DOWN(ramend);
|
|
for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) {
|
|
/*
|
|
* Skip highmem here so we get an accurate max_low_pfn if low
|
|
* memory stops short of high memory.
|
|
* If the region overlaps HIGHMEM_START, end is clipped so
|
|
* max_pfn excludes the highmem portion.
|
|
*/
|
|
if (start >= PFN_DOWN(HIGHMEM_START))
|
|
continue;
|
|
if (end > PFN_DOWN(HIGHMEM_START))
|
|
end = PFN_DOWN(HIGHMEM_START);
|
|
if (end > max_low_pfn)
|
|
max_low_pfn = end;
|
|
}
|
|
|
|
if (min_low_pfn >= max_low_pfn)
|
|
panic("Incorrect memory mapping !!!");
|
|
|
|
if (max_pfn > PFN_DOWN(HIGHMEM_START)) {
|
|
#ifdef CONFIG_HIGHMEM
|
|
highstart_pfn = PFN_DOWN(HIGHMEM_START);
|
|
highend_pfn = max_pfn;
|
|
#else
|
|
max_low_pfn = PFN_DOWN(HIGHMEM_START);
|
|
max_pfn = max_low_pfn;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Reserve initrd memory if needed.
|
|
*/
|
|
finalize_initrd();
|
|
}
|
|
|
|
#endif /* CONFIG_SGI_IP27 */
|
|
|
|
static int usermem __initdata;
|
|
|
|
static int __init early_parse_mem(char *p)
|
|
{
|
|
phys_addr_t start, size;
|
|
|
|
/*
|
|
* If a user specifies memory size, we
|
|
* blow away any automatically generated
|
|
* size.
|
|
*/
|
|
if (usermem == 0) {
|
|
usermem = 1;
|
|
memblock_remove(memblock_start_of_DRAM(),
|
|
memblock_end_of_DRAM() - memblock_start_of_DRAM());
|
|
}
|
|
start = 0;
|
|
size = memparse(p, &p);
|
|
if (*p == '@')
|
|
start = memparse(p + 1, &p);
|
|
|
|
memblock_add(start, size);
|
|
|
|
return 0;
|
|
}
|
|
early_param("mem", early_parse_mem);
|
|
|
|
static int __init early_parse_memmap(char *p)
|
|
{
|
|
char *oldp;
|
|
u64 start_at, mem_size;
|
|
|
|
if (!p)
|
|
return -EINVAL;
|
|
|
|
if (!strncmp(p, "exactmap", 8)) {
|
|
pr_err("\"memmap=exactmap\" invalid on MIPS\n");
|
|
return 0;
|
|
}
|
|
|
|
oldp = p;
|
|
mem_size = memparse(p, &p);
|
|
if (p == oldp)
|
|
return -EINVAL;
|
|
|
|
if (*p == '@') {
|
|
start_at = memparse(p+1, &p);
|
|
memblock_add(start_at, mem_size);
|
|
} else if (*p == '#') {
|
|
pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n");
|
|
return -EINVAL;
|
|
} else if (*p == '$') {
|
|
start_at = memparse(p+1, &p);
|
|
memblock_add(start_at, mem_size);
|
|
memblock_reserve(start_at, mem_size);
|
|
} else {
|
|
pr_err("\"memmap\" invalid format!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (*p == '\0') {
|
|
usermem = 1;
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
early_param("memmap", early_parse_memmap);
|
|
|
|
static void __init mips_reserve_vmcore(void)
|
|
{
|
|
#ifdef CONFIG_PROC_VMCORE
|
|
phys_addr_t start, end;
|
|
u64 i;
|
|
|
|
if (!elfcorehdr_size) {
|
|
for_each_mem_range(i, &start, &end) {
|
|
if (elfcorehdr_addr >= start && elfcorehdr_addr < end) {
|
|
/*
|
|
* Reserve from the elf core header to the end of
|
|
* the memory segment, that should all be kdump
|
|
* reserved memory.
|
|
*/
|
|
elfcorehdr_size = end - elfcorehdr_addr;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
pr_info("Reserving %ldKB of memory at %ldKB for kdump\n",
|
|
(unsigned long)elfcorehdr_size >> 10, (unsigned long)elfcorehdr_addr >> 10);
|
|
|
|
memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
/* 64M alignment for crash kernel regions */
|
|
#define CRASH_ALIGN SZ_64M
|
|
#define CRASH_ADDR_MAX SZ_512M
|
|
|
|
static void __init mips_parse_crashkernel(void)
|
|
{
|
|
unsigned long long total_mem;
|
|
unsigned long long crash_size, crash_base;
|
|
int ret;
|
|
|
|
total_mem = memblock_phys_mem_size();
|
|
ret = parse_crashkernel(boot_command_line, total_mem,
|
|
&crash_size, &crash_base);
|
|
if (ret != 0 || crash_size <= 0)
|
|
return;
|
|
|
|
if (crash_base <= 0) {
|
|
crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN,
|
|
CRASH_ALIGN,
|
|
CRASH_ADDR_MAX);
|
|
if (!crash_base) {
|
|
pr_warn("crashkernel reservation failed - No suitable area found.\n");
|
|
return;
|
|
}
|
|
} else {
|
|
unsigned long long start;
|
|
|
|
start = memblock_phys_alloc_range(crash_size, 1,
|
|
crash_base,
|
|
crash_base + crash_size);
|
|
if (start != crash_base) {
|
|
pr_warn("Invalid memory region reserved for crash kernel\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
crashk_res.start = crash_base;
|
|
crashk_res.end = crash_base + crash_size - 1;
|
|
}
|
|
|
|
static void __init request_crashkernel(struct resource *res)
|
|
{
|
|
int ret;
|
|
|
|
if (crashk_res.start == crashk_res.end)
|
|
return;
|
|
|
|
ret = request_resource(res, &crashk_res);
|
|
if (!ret)
|
|
pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
|
|
(unsigned long)(resource_size(&crashk_res) >> 20),
|
|
(unsigned long)(crashk_res.start >> 20));
|
|
}
|
|
#else /* !defined(CONFIG_KEXEC) */
|
|
static void __init mips_parse_crashkernel(void)
|
|
{
|
|
}
|
|
|
|
static void __init request_crashkernel(struct resource *res)
|
|
{
|
|
}
|
|
#endif /* !defined(CONFIG_KEXEC) */
|
|
|
|
static void __init check_kernel_sections_mem(void)
|
|
{
|
|
phys_addr_t start = __pa_symbol(&_text);
|
|
phys_addr_t size = __pa_symbol(&_end) - start;
|
|
|
|
if (!memblock_is_region_memory(start, size)) {
|
|
pr_info("Kernel sections are not in the memory maps\n");
|
|
memblock_add(start, size);
|
|
}
|
|
}
|
|
|
|
static void __init bootcmdline_append(const char *s, size_t max)
|
|
{
|
|
if (!s[0] || !max)
|
|
return;
|
|
|
|
if (boot_command_line[0])
|
|
strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
|
|
|
|
strlcat(boot_command_line, s, max);
|
|
}
|
|
|
|
#ifdef CONFIG_OF_EARLY_FLATTREE
|
|
|
|
static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname,
|
|
int depth, void *data)
|
|
{
|
|
bool *dt_bootargs = data;
|
|
const char *p;
|
|
int l;
|
|
|
|
if (depth != 1 || !data ||
|
|
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
|
|
return 0;
|
|
|
|
p = of_get_flat_dt_prop(node, "bootargs", &l);
|
|
if (p != NULL && l > 0) {
|
|
bootcmdline_append(p, min(l, COMMAND_LINE_SIZE));
|
|
*dt_bootargs = true;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
#endif /* CONFIG_OF_EARLY_FLATTREE */
|
|
|
|
static void __init bootcmdline_init(void)
|
|
{
|
|
bool dt_bootargs = false;
|
|
|
|
/*
|
|
* If CMDLINE_OVERRIDE is enabled then initializing the command line is
|
|
* trivial - we simply use the built-in command line unconditionally &
|
|
* unmodified.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
|
|
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If the user specified a built-in command line &
|
|
* MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
|
|
* prepended to arguments from the bootloader or DT so we'll copy them
|
|
* to the start of boot_command_line here. Otherwise, empty
|
|
* boot_command_line to undo anything early_init_dt_scan_chosen() did.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
|
|
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
|
|
else
|
|
boot_command_line[0] = 0;
|
|
|
|
#ifdef CONFIG_OF_EARLY_FLATTREE
|
|
/*
|
|
* If we're configured to take boot arguments from DT, look for those
|
|
* now.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) ||
|
|
IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND))
|
|
of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs);
|
|
#endif
|
|
|
|
/*
|
|
* If we didn't get any arguments from DT (regardless of whether that's
|
|
* because we weren't configured to look for them, or because we looked
|
|
* & found none) then we'll take arguments from the bootloader.
|
|
* plat_mem_setup() should have filled arcs_cmdline with arguments from
|
|
* the bootloader.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs)
|
|
bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE);
|
|
|
|
/*
|
|
* If the user specified a built-in command line & we didn't already
|
|
* prepend it, we append it to boot_command_line here.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_CMDLINE_BOOL) &&
|
|
!IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
|
|
bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE);
|
|
}
|
|
|
|
/*
|
|
* arch_mem_init - initialize memory management subsystem
|
|
*
|
|
* o plat_mem_setup() detects the memory configuration and will record detected
|
|
* memory areas using memblock_add.
|
|
*
|
|
* At this stage the memory configuration of the system is known to the
|
|
* kernel but generic memory management system is still entirely uninitialized.
|
|
*
|
|
* o bootmem_init()
|
|
* o sparse_init()
|
|
* o paging_init()
|
|
* o dma_contiguous_reserve()
|
|
*
|
|
* At this stage the bootmem allocator is ready to use.
|
|
*
|
|
* NOTE: historically plat_mem_setup did the entire platform initialization.
|
|
* This was rather impractical because it meant plat_mem_setup had to
|
|
* get away without any kind of memory allocator. To keep old code from
|
|
* breaking plat_setup was just renamed to plat_mem_setup and a second platform
|
|
* initialization hook for anything else was introduced.
|
|
*/
|
|
static void __init arch_mem_init(char **cmdline_p)
|
|
{
|
|
/* call board setup routine */
|
|
plat_mem_setup();
|
|
memblock_set_bottom_up(true);
|
|
|
|
bootcmdline_init();
|
|
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
|
|
*cmdline_p = command_line;
|
|
|
|
parse_early_param();
|
|
|
|
if (usermem)
|
|
pr_info("User-defined physical RAM map overwrite\n");
|
|
|
|
check_kernel_sections_mem();
|
|
|
|
early_init_fdt_reserve_self();
|
|
early_init_fdt_scan_reserved_mem();
|
|
|
|
#ifndef CONFIG_NUMA
|
|
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
|
|
#endif
|
|
bootmem_init();
|
|
|
|
/*
|
|
* Prevent memblock from allocating high memory.
|
|
* This cannot be done before max_low_pfn is detected, so up
|
|
* to this point is possible to only reserve physical memory
|
|
* with memblock_reserve; memblock_alloc* can be used
|
|
* only after this point
|
|
*/
|
|
memblock_set_current_limit(PFN_PHYS(max_low_pfn));
|
|
|
|
mips_reserve_vmcore();
|
|
|
|
mips_parse_crashkernel();
|
|
device_tree_init();
|
|
|
|
/*
|
|
* In order to reduce the possibility of kernel panic when failed to
|
|
* get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate
|
|
* low memory as small as possible before plat_swiotlb_setup(), so
|
|
* make sparse_init() using top-down allocation.
|
|
*/
|
|
memblock_set_bottom_up(false);
|
|
sparse_init();
|
|
memblock_set_bottom_up(true);
|
|
|
|
plat_swiotlb_setup();
|
|
|
|
dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
|
|
|
|
/* Reserve for hibernation. */
|
|
memblock_reserve(__pa_symbol(&__nosave_begin),
|
|
__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
|
|
|
|
early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));
|
|
}
|
|
|
|
static void __init resource_init(void)
|
|
{
|
|
phys_addr_t start, end;
|
|
u64 i;
|
|
|
|
if (UNCAC_BASE != IO_BASE)
|
|
return;
|
|
|
|
code_resource.start = __pa_symbol(&_text);
|
|
code_resource.end = __pa_symbol(&_etext) - 1;
|
|
data_resource.start = __pa_symbol(&_etext);
|
|
data_resource.end = __pa_symbol(&_edata) - 1;
|
|
bss_resource.start = __pa_symbol(&__bss_start);
|
|
bss_resource.end = __pa_symbol(&__bss_stop) - 1;
|
|
|
|
for_each_mem_range(i, &start, &end) {
|
|
struct resource *res;
|
|
|
|
res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
|
|
if (!res)
|
|
panic("%s: Failed to allocate %zu bytes\n", __func__,
|
|
sizeof(struct resource));
|
|
|
|
res->start = start;
|
|
/*
|
|
* In memblock, end points to the first byte after the
|
|
* range while in resourses, end points to the last byte in
|
|
* the range.
|
|
*/
|
|
res->end = end - 1;
|
|
res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
|
|
res->name = "System RAM";
|
|
|
|
request_resource(&iomem_resource, res);
|
|
|
|
/*
|
|
* We don't know which RAM region contains kernel data,
|
|
* so we 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);
|
|
request_crashkernel(res);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
static void __init prefill_possible_map(void)
|
|
{
|
|
int i, possible = num_possible_cpus();
|
|
|
|
if (possible > nr_cpu_ids)
|
|
possible = nr_cpu_ids;
|
|
|
|
for (i = 0; i < possible; i++)
|
|
set_cpu_possible(i, true);
|
|
for (; i < NR_CPUS; i++)
|
|
set_cpu_possible(i, false);
|
|
|
|
nr_cpu_ids = possible;
|
|
}
|
|
#else
|
|
static inline void prefill_possible_map(void) {}
|
|
#endif
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
cpu_probe();
|
|
mips_cm_probe();
|
|
prom_init();
|
|
|
|
setup_early_fdc_console();
|
|
#ifdef CONFIG_EARLY_PRINTK
|
|
setup_early_printk();
|
|
#endif
|
|
cpu_report();
|
|
check_bugs_early();
|
|
|
|
#if defined(CONFIG_VT)
|
|
#if defined(CONFIG_VGA_CONSOLE)
|
|
conswitchp = &vga_con;
|
|
#endif
|
|
#endif
|
|
|
|
arch_mem_init(cmdline_p);
|
|
dmi_setup();
|
|
|
|
resource_init();
|
|
plat_smp_setup();
|
|
prefill_possible_map();
|
|
|
|
cpu_cache_init();
|
|
paging_init();
|
|
|
|
memblock_dump_all();
|
|
}
|
|
|
|
unsigned long kernelsp[NR_CPUS];
|
|
unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
struct dentry *mips_debugfs_dir;
|
|
static int __init debugfs_mips(void)
|
|
{
|
|
mips_debugfs_dir = debugfs_create_dir("mips", NULL);
|
|
return 0;
|
|
}
|
|
arch_initcall(debugfs_mips);
|
|
#endif
|
|
|
|
#ifdef CONFIG_DMA_NONCOHERENT
|
|
static int __init setcoherentio(char *str)
|
|
{
|
|
dma_default_coherent = true;
|
|
pr_info("Hardware DMA cache coherency (command line)\n");
|
|
return 0;
|
|
}
|
|
early_param("coherentio", setcoherentio);
|
|
|
|
static int __init setnocoherentio(char *str)
|
|
{
|
|
dma_default_coherent = false;
|
|
pr_info("Software DMA cache coherency (command line)\n");
|
|
return 0;
|
|
}
|
|
early_param("nocoherentio", setnocoherentio);
|
|
#endif
|