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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/sparc/kernel/starfire.c | |
parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
download | linux-fsl-qoriq-2ca1a615835d9f4990f42102ab1f2ef434e7e89c.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/sparc/kernel/starfire.c')
-rw-r--r-- | arch/sparc/kernel/starfire.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/sparc/kernel/starfire.c b/arch/sparc/kernel/starfire.c new file mode 100644 index 0000000..060d0f3 --- /dev/null +++ b/arch/sparc/kernel/starfire.c @@ -0,0 +1,116 @@ +/* + * starfire.c: Starfire/E10000 support. + * + * Copyright (C) 1998 David S. Miller (davem@redhat.com) + * Copyright (C) 2000 Anton Blanchard (anton@samba.org) + */ + +#include <linux/kernel.h> +#include <linux/slab.h> + +#include <asm/page.h> +#include <asm/oplib.h> +#include <asm/smp.h> +#include <asm/upa.h> +#include <asm/starfire.h> + +/* + * A few places around the kernel check this to see if + * they need to call us to do things in a Starfire specific + * way. + */ +int this_is_starfire = 0; + +void check_if_starfire(void) +{ + int ssnode = prom_finddevice("/ssp-serial"); + if (ssnode != 0 && ssnode != -1) + this_is_starfire = 1; +} + +int starfire_hard_smp_processor_id(void) +{ + return upa_readl(0x1fff40000d0UL); +} + +/* + * Each Starfire board has 32 registers which perform translation + * and delivery of traditional interrupt packets into the extended + * Starfire hardware format. Essentially UPAID's now have 2 more + * bits than in all previous Sun5 systems. + */ +struct starfire_irqinfo { + unsigned long imap_slots[32]; + unsigned long tregs[32]; + struct starfire_irqinfo *next; + int upaid, hwmid; +}; + +static struct starfire_irqinfo *sflist = NULL; + +/* Beam me up Scott(McNeil)y... */ +void starfire_hookup(int upaid) +{ + struct starfire_irqinfo *p; + unsigned long treg_base, hwmid, i; + + p = kmalloc(sizeof(*p), GFP_KERNEL); + if (!p) { + prom_printf("starfire_hookup: No memory, this is insane.\n"); + prom_halt(); + } + treg_base = 0x100fc000000UL; + hwmid = ((upaid & 0x3c) << 1) | + ((upaid & 0x40) >> 4) | + (upaid & 0x3); + p->hwmid = hwmid; + treg_base += (hwmid << 33UL); + treg_base += 0x200UL; + for (i = 0; i < 32; i++) { + p->imap_slots[i] = 0UL; + p->tregs[i] = treg_base + (i * 0x10UL); + /* Lets play it safe and not overwrite existing mappings */ + if (upa_readl(p->tregs[i]) != 0) + p->imap_slots[i] = 0xdeadbeaf; + } + p->upaid = upaid; + p->next = sflist; + sflist = p; +} + +unsigned int starfire_translate(unsigned long imap, + unsigned int upaid) +{ + struct starfire_irqinfo *p; + unsigned int bus_hwmid; + unsigned int i; + + bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f; + for (p = sflist; p != NULL; p = p->next) + if (p->hwmid == bus_hwmid) + break; + if (p == NULL) { + prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n", + ((unsigned long)imap)); + prom_halt(); + } + for (i = 0; i < 32; i++) { + if (p->imap_slots[i] == imap || + p->imap_slots[i] == 0UL) + break; + } + if (i == 32) { + printk("starfire_translate: Are you kidding me?\n"); + panic("Lucy in the sky...."); + } + p->imap_slots[i] = imap; + + /* map to real upaid */ + upaid = (((upaid & 0x3c) << 1) | + ((upaid & 0x40) >> 4) | + (upaid & 0x3)); + + upa_writel(upaid, p->tregs[i]); + + return i; +} |