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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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86758b5048
ioremap_prot() currently accepts pgprot_val parameter as an unsigned long, thus implicitly assuming that pgprot_val and pgprot_t could never be bigger than unsigned long. But this assumption soon will not be true on arm64 when using D128 pgtables. In 128 bit page table configuration, unsigned long is 64 bit, but pgprot_t is 128 bit. Passing platform abstracted pgprot_t argument is better as compared to size based data types. Let's change the parameter to directly pass pgprot_t like another similar helper generic_ioremap_prot(). Without this change in place, D128 configuration does not work on arm64 as the top 64 bits gets silently stripped when passing the protection value to this function. Link: https://lkml.kernel.org/r/20250218101954.415331-1-anshuman.khandual@arm.com Signed-off-by: Ryan Roberts <ryan.roberts@arm.com> Co-developed-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/sh/boards/lbox/setup.c
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*
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* Copyright (C) 2007 Nobuhiro Iwamatsu
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*
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* NTT COMWARE L-BOX RE2 Support
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/ata_platform.h>
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#include <asm/machvec.h>
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#include <asm/addrspace.h>
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#include <mach/lboxre2.h>
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#include <asm/io.h>
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static struct resource cf_ide_resources[] = {
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[0] = {
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.start = 0x1f0,
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.end = 0x1f0 + 8 ,
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.flags = IORESOURCE_IO,
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},
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[1] = {
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.start = 0x1f0 + 0x206,
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.end = 0x1f0 +8 + 0x206 + 8,
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.flags = IORESOURCE_IO,
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},
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[2] = {
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.start = IRQ_CF0,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device cf_ide_device = {
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.name = "pata_platform",
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.id = -1,
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.num_resources = ARRAY_SIZE(cf_ide_resources),
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.resource = cf_ide_resources,
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};
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static struct platform_device *lboxre2_devices[] __initdata = {
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&cf_ide_device,
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};
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static int __init lboxre2_devices_setup(void)
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{
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u32 cf0_io_base; /* Boot CF base address */
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pgprot_t prot;
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unsigned long paddrbase, psize;
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/* open I/O area window */
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paddrbase = virt_to_phys((void*)PA_AREA5_IO);
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psize = PAGE_SIZE;
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prot = PAGE_KERNEL_PCC(1, _PAGE_PCC_IO16);
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cf0_io_base = (u32)ioremap_prot(paddrbase, psize, prot);
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if (!cf0_io_base) {
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printk(KERN_ERR "%s : can't open CF I/O window!\n" , __func__ );
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return -ENOMEM;
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}
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cf_ide_resources[0].start += cf0_io_base ;
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cf_ide_resources[0].end += cf0_io_base ;
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cf_ide_resources[1].start += cf0_io_base ;
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cf_ide_resources[1].end += cf0_io_base ;
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return platform_add_devices(lboxre2_devices,
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ARRAY_SIZE(lboxre2_devices));
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}
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device_initcall(lboxre2_devices_setup);
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/*
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* The Machine Vector
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*/
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static struct sh_machine_vector mv_lboxre2 __initmv = {
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.mv_name = "L-BOX RE2",
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.mv_init_irq = init_lboxre2_IRQ,
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};
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