mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 13:03:25 +01:00
3dceb8a9a9
Updates:
- Fixes from me to cleanup all compiler warnings reported under
arch/openrisc.
- One cleanup from Linus Walleij to convert pfn macros to static
inlines.
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Merge tag 'for-linus' of https://github.com/openrisc/linux
Pull OpenRISC updates from Stafford Horne:
- Fixes from me to cleanup all compiler warnings reported under
arch/openrisc
- One cleanup from Linus Walleij to convert pfn macros to static
inlines
* tag 'for-linus' of https://github.com/openrisc/linux:
openrisc: Remove kernel-doc marker from ioremap comment
openrisc: Remove unused tlb_init function
openriac: Remove unused nommu_dump_state function
openrisc: Include cpu.h and switch_to.h for prototypes
openrisc: Add prototype for die to bug.h
openrisc: Add prototype for show_registers to processor.h
openrisc: Declare do_signal function as static
openrisc: Add missing prototypes for assembly called fnctions
openrisc: Make pfn accessors statics inlines
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* OpenRISC ioremap.c
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* Modifications for the OpenRISC architecture:
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* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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*/
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#include <linux/vmalloc.h>
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#include <linux/io.h>
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#include <linux/pgtable.h>
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#include <asm/pgalloc.h>
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#include <asm/fixmap.h>
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#include <asm/bug.h>
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#include <linux/sched.h>
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#include <asm/tlbflush.h>
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extern int mem_init_done;
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/*
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* OK, this one's a bit tricky... ioremap can get called before memory is
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* initialized (early serial console does this) and will want to alloc a page
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* for its mapping. No userspace pages will ever get allocated before memory
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* is initialized so this applies only to kernel pages. In the event that
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* this is called before memory is initialized we allocate the page using
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* the memblock infrastructure.
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*/
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pte_t __ref *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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pte_t *pte;
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if (likely(mem_init_done)) {
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pte = (pte_t *)get_zeroed_page(GFP_KERNEL);
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} else {
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pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
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if (!pte)
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panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
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__func__, PAGE_SIZE, PAGE_SIZE);
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}
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return pte;
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}
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