2 * This is a good place to put board specific reboot fixups.
4 * List of supported fixups:
5 * geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz>
6 * geode-gx/lx/cs5536 - Andres Salomon <dilinger@debian.org>
10 #include <asm/delay.h>
11 #include <linux/pci.h>
12 #include <linux/interrupt.h>
13 #include <asm/reboot_fixups.h>
15 #include <asm/geode.h>
17 static void cs5530a_warm_reset(struct pci_dev *dev)
19 /* writing 1 to the reset control register, 0x44 causes the
20 cs5530a to perform a system warm reset */
21 pci_write_config_byte(dev, 0x44, 0x1);
22 udelay(50); /* shouldn't get here but be safe and spin-a-while */
26 static void cs5536_warm_reset(struct pci_dev *dev)
28 /* writing 1 to the LSB of this MSR causes a hard reset */
29 wrmsrl(MSR_DIVIL_SOFT_RESET, 1ULL);
30 udelay(50); /* shouldn't get here but be safe and spin a while */
36 void (*reboot_fixup)(struct pci_dev *);
39 static struct device_fixup fixups_table[] = {
40 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
41 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
42 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset },
46 * we see if any fixup is available for our current hardware. if there
47 * is a fixup, we call it and we expect to never return from it. if we
48 * do return, we keep looking and then eventually fall back to the
49 * standard mach_reboot on return.
51 void mach_reboot_fixups(void)
53 struct device_fixup *cur;
57 /* we can be called from sysrq-B code. In such a case it is
58 * prohibited to dig PCI */
62 for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
63 cur = &(fixups_table[i]);
64 dev = pci_get_device(cur->vendor, cur->device, NULL);
68 cur->reboot_fixup(dev);