973efae21b
The reboot_fixups stuff seems to be a bit of a mess, specifically the header is in linux/ when its a purely i386-specific piece of code. I'm not sure why it has its config option; its only currently needed for "geode-gx1/cs5530a", so perhaps whatever config option controls that hardware should enable this? Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de>
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/*
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* linux/arch/i386/kernel/reboot_fixups.c
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*
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* This is a good place to put board specific reboot fixups.
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*
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* List of supported fixups:
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* geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz>
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*
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*/
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#include <asm/delay.h>
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#include <linux/pci.h>
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#include <asm/reboot_fixups.h>
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static void cs5530a_warm_reset(struct pci_dev *dev)
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{
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/* writing 1 to the reset control register, 0x44 causes the
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cs5530a to perform a system warm reset */
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pci_write_config_byte(dev, 0x44, 0x1);
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udelay(50); /* shouldn't get here but be safe and spin-a-while */
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return;
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}
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struct device_fixup {
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unsigned int vendor;
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unsigned int device;
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void (*reboot_fixup)(struct pci_dev *);
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};
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static struct device_fixup fixups_table[] = {
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{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
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};
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/*
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* we see if any fixup is available for our current hardware. if there
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* is a fixup, we call it and we expect to never return from it. if we
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* do return, we keep looking and then eventually fall back to the
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* standard mach_reboot on return.
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*/
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void mach_reboot_fixups(void)
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{
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struct device_fixup *cur;
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struct pci_dev *dev;
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int i;
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for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
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cur = &(fixups_table[i]);
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dev = pci_get_device(cur->vendor, cur->device, NULL);
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if (!dev)
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continue;
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cur->reboot_fixup(dev);
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}
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}
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