linux_dsm_epyc7002/arch/riscv/kernel/soc.c
Mike Rapoport ca5999fde0 mm: introduce include/linux/pgtable.h
The include/linux/pgtable.h is going to be the home of generic page table
manipulation functions.

Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and
make the latter include asm/pgtable.h.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-09 09:39:13 -07:00

56 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2020 Western Digital Corporation or its affiliates.
*/
#include <linux/init.h>
#include <linux/libfdt.h>
#include <linux/pgtable.h>
#include <asm/soc.h>
/*
* This is called extremly early, before parse_dtb(), to allow initializing
* SoC hardware before memory or any device driver initialization.
*/
void __init soc_early_init(void)
{
void (*early_fn)(const void *fdt);
const struct of_device_id *s;
const void *fdt = dtb_early_va;
for (s = (void *)&__soc_early_init_table_start;
(void *)s < (void *)&__soc_early_init_table_end; s++) {
if (!fdt_node_check_compatible(fdt, 0, s->compatible)) {
early_fn = s->data;
early_fn(fdt);
return;
}
}
}
static bool soc_builtin_dtb_match(unsigned long vendor_id,
unsigned long arch_id, unsigned long imp_id,
const struct soc_builtin_dtb *entry)
{
return entry->vendor_id == vendor_id &&
entry->arch_id == arch_id &&
entry->imp_id == imp_id;
}
void * __init soc_lookup_builtin_dtb(void)
{
unsigned long vendor_id, arch_id, imp_id;
const struct soc_builtin_dtb *s;
__asm__ ("csrr %0, mvendorid" : "=r"(vendor_id));
__asm__ ("csrr %0, marchid" : "=r"(arch_id));
__asm__ ("csrr %0, mimpid" : "=r"(imp_id));
for (s = (void *)&__soc_builtin_dtb_table_start;
(void *)s < (void *)&__soc_builtin_dtb_table_end; s++) {
if (soc_builtin_dtb_match(vendor_id, arch_id, imp_id, s))
return s->dtb_func();
}
return NULL;
}