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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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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>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/sh/boards/landisk/setup.c
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*
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* I-O DATA Device, Inc. LANDISK Support.
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*
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* Copyright (C) 2000 Kazumoto Kojima
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* Copyright (C) 2002 Paul Mundt
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* Copylight (C) 2002 Atom Create Engineering Co., Ltd.
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* Copyright (C) 2005-2007 kogiidena
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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 <linux/pm.h>
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#include <linux/mm.h>
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#include <asm/machvec.h>
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#include <mach-landisk/mach/iodata_landisk.h>
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#include <asm/io.h>
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static void landisk_power_off(void)
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{
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__raw_writeb(0x01, PA_SHUTDOWN);
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}
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static struct resource cf_ide_resources[3];
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static struct pata_platform_info pata_info = {
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.ioport_shift = 1,
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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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.dev = {
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.platform_data = &pata_info,
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},
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};
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static struct platform_device rtc_device = {
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.name = "rs5c313",
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.id = -1,
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};
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static struct platform_device *landisk_devices[] __initdata = {
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&cf_ide_device,
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&rtc_device,
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};
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static int __init landisk_devices_setup(void)
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{
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pgprot_t prot;
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unsigned long paddrbase;
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void *cf_ide_base;
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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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prot = PAGE_KERNEL_PCC(1, _PAGE_PCC_IO16);
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cf_ide_base = ioremap_prot(paddrbase, PAGE_SIZE, prot);
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if (!cf_ide_base) {
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printk("allocate_cf_area : can't open CF I/O window!\n");
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return -ENOMEM;
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}
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/* IDE cmd address : 0x1f0-0x1f7 and 0x3f6 */
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cf_ide_resources[0].start = (unsigned long)cf_ide_base + 0x40;
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cf_ide_resources[0].end = (unsigned long)cf_ide_base + 0x40 + 0x0f;
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cf_ide_resources[0].flags = IORESOURCE_IO;
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cf_ide_resources[1].start = (unsigned long)cf_ide_base + 0x2c;
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cf_ide_resources[1].end = (unsigned long)cf_ide_base + 0x2c + 0x03;
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cf_ide_resources[1].flags = IORESOURCE_IO;
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cf_ide_resources[2].start = IRQ_FATA;
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cf_ide_resources[2].flags = IORESOURCE_IRQ;
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return platform_add_devices(landisk_devices,
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ARRAY_SIZE(landisk_devices));
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}
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device_initcall(landisk_devices_setup);
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static void __init landisk_setup(char **cmdline_p)
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{
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/* I/O port identity mapping */
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__set_io_port_base(0);
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/* LED ON */
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__raw_writeb(__raw_readb(PA_LED) | 0x03, PA_LED);
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printk(KERN_INFO "I-O DATA DEVICE, INC. \"LANDISK Series\" support.\n");
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pm_power_off = landisk_power_off;
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}
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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_landisk __initmv = {
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.mv_name = "LANDISK",
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.mv_setup = landisk_setup,
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.mv_init_irq = init_landisk_IRQ,
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};
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