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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a88b5ba8bd
o Move all files from sparc64/kernel/ to sparc/kernel - rename as appropriate o Update sparc/Makefile to the changes o Update sparc/kernel/Makefile to include the sparc64 files NOTE: This commit changes link order on sparc64! Link order had to change for either of sparc32 and sparc64. And assuming sparc64 see more testing than sparc32 change link order on sparc64 where issues will be caught faster. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*
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* starfire.c: Starfire/E10000 support.
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*
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* Copyright (C) 1998 David S. Miller (davem@redhat.com)
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* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <asm/page.h>
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#include <asm/oplib.h>
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#include <asm/smp.h>
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#include <asm/upa.h>
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#include <asm/starfire.h>
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/*
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* A few places around the kernel check this to see if
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* they need to call us to do things in a Starfire specific
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* way.
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*/
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int this_is_starfire = 0;
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void check_if_starfire(void)
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{
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int ssnode = prom_finddevice("/ssp-serial");
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if (ssnode != 0 && ssnode != -1)
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this_is_starfire = 1;
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}
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int starfire_hard_smp_processor_id(void)
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{
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return upa_readl(0x1fff40000d0UL);
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}
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/*
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* Each Starfire board has 32 registers which perform translation
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* and delivery of traditional interrupt packets into the extended
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* Starfire hardware format. Essentially UPAID's now have 2 more
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* bits than in all previous Sun5 systems.
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*/
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struct starfire_irqinfo {
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unsigned long imap_slots[32];
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unsigned long tregs[32];
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struct starfire_irqinfo *next;
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int upaid, hwmid;
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};
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static struct starfire_irqinfo *sflist = NULL;
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/* Beam me up Scott(McNeil)y... */
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void starfire_hookup(int upaid)
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{
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struct starfire_irqinfo *p;
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unsigned long treg_base, hwmid, i;
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p = kmalloc(sizeof(*p), GFP_KERNEL);
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if (!p) {
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prom_printf("starfire_hookup: No memory, this is insane.\n");
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prom_halt();
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}
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treg_base = 0x100fc000000UL;
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hwmid = ((upaid & 0x3c) << 1) |
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((upaid & 0x40) >> 4) |
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(upaid & 0x3);
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p->hwmid = hwmid;
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treg_base += (hwmid << 33UL);
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treg_base += 0x200UL;
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for (i = 0; i < 32; i++) {
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p->imap_slots[i] = 0UL;
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p->tregs[i] = treg_base + (i * 0x10UL);
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/* Lets play it safe and not overwrite existing mappings */
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if (upa_readl(p->tregs[i]) != 0)
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p->imap_slots[i] = 0xdeadbeaf;
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}
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p->upaid = upaid;
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p->next = sflist;
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sflist = p;
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}
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unsigned int starfire_translate(unsigned long imap,
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unsigned int upaid)
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{
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struct starfire_irqinfo *p;
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unsigned int bus_hwmid;
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unsigned int i;
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bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
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for (p = sflist; p != NULL; p = p->next)
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if (p->hwmid == bus_hwmid)
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break;
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if (p == NULL) {
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prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
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((unsigned long)imap));
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prom_halt();
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}
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for (i = 0; i < 32; i++) {
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if (p->imap_slots[i] == imap ||
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p->imap_slots[i] == 0UL)
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break;
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}
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if (i == 32) {
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printk("starfire_translate: Are you kidding me?\n");
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panic("Lucy in the sky....");
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}
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p->imap_slots[i] = imap;
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/* map to real upaid */
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upaid = (((upaid & 0x3c) << 1) |
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((upaid & 0x40) >> 4) |
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(upaid & 0x3));
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upa_writel(upaid, p->tregs[i]);
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return i;
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}
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