diff options
Diffstat (limited to 'arch/mips/sgi-ip27/ip27-klnuma.c')
| -rw-r--r-- | arch/mips/sgi-ip27/ip27-klnuma.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip27/ip27-klnuma.c b/arch/mips/sgi-ip27/ip27-klnuma.c new file mode 100644 index 000000000..bda90cf87 --- /dev/null +++ b/arch/mips/sgi-ip27/ip27-klnuma.c @@ -0,0 +1,131 @@ +/* + * Ported from IRIX to Linux by Kanoj Sarcar, 06/08/00. + * Copyright 2000 - 2001 Silicon Graphics, Inc. + * Copyright 2000 - 2001 Kanoj Sarcar (kanoj@sgi.com) + */ +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/mmzone.h> +#include <linux/kernel.h> +#include <linux/nodemask.h> +#include <linux/string.h> + +#include <asm/page.h> +#include <asm/sections.h> +#include <asm/sn/types.h> +#include <asm/sn/arch.h> +#include <asm/sn/gda.h> +#include <asm/sn/hub.h> +#include <asm/sn/mapped_kernel.h> +#include <asm/sn/sn_private.h> + +static cpumask_t ktext_repmask; + +/* + * XXX - This needs to be much smarter about where it puts copies of the + * kernel. For example, we should never put a copy on a headless node, + * and we should respect the topology of the machine. + */ +void __init setup_replication_mask(void) +{ + /* Set only the master cnode's bit. The master cnode is always 0. */ + cpumask_clear(&ktext_repmask); + cpumask_set_cpu(0, &ktext_repmask); + +#ifdef CONFIG_REPLICATE_KTEXT +#ifndef CONFIG_MAPPED_KERNEL +#error Kernel replication works with mapped kernel support. No calias support. +#endif + { + cnodeid_t cnode; + + for_each_online_node(cnode) { + if (cnode == 0) + continue; + /* Advertise that we have a copy of the kernel */ + cpumask_set_cpu(cnode, &ktext_repmask); + } + } +#endif + /* Set up a GDA pointer to the replication mask. */ + GDA->g_ktext_repmask = &ktext_repmask; +} + + +static __init void set_ktext_source(nasid_t client_nasid, nasid_t server_nasid) +{ + kern_vars_t *kvp; + + kvp = &hub_data(client_nasid)->kern_vars; + + KERN_VARS_ADDR(client_nasid) = (unsigned long)kvp; + + kvp->kv_magic = KV_MAGIC; + kvp->kv_ro_nasid = server_nasid; + kvp->kv_rw_nasid = master_nasid; + kvp->kv_ro_baseaddr = NODE_CAC_BASE(server_nasid); + kvp->kv_rw_baseaddr = NODE_CAC_BASE(master_nasid); + printk("REPLICATION: ON nasid %d, ktext from nasid %d, kdata from nasid %d\n", client_nasid, server_nasid, master_nasid); +} + +/* XXX - When the BTE works, we should use it instead of this. */ +static __init void copy_kernel(nasid_t dest_nasid) +{ + unsigned long dest_kern_start, source_start, source_end, kern_size; + + source_start = (unsigned long) _stext; + source_end = (unsigned long) _etext; + kern_size = source_end - source_start; + + dest_kern_start = CHANGE_ADDR_NASID(MAPPED_KERN_RO_TO_K0(source_start), + dest_nasid); + memcpy((void *)dest_kern_start, (void *)source_start, kern_size); +} + +void __init replicate_kernel_text() +{ + cnodeid_t cnode; + nasid_t client_nasid; + nasid_t server_nasid; + + server_nasid = master_nasid; + + /* Record where the master node should get its kernel text */ + set_ktext_source(master_nasid, master_nasid); + + for_each_online_node(cnode) { + if (cnode == 0) + continue; + client_nasid = COMPACT_TO_NASID_NODEID(cnode); + + /* Check if this node should get a copy of the kernel */ + if (cpumask_test_cpu(cnode, &ktext_repmask)) { + server_nasid = client_nasid; + copy_kernel(server_nasid); + } + + /* Record where this node should get its kernel text */ + set_ktext_source(client_nasid, server_nasid); + } +} + +/* + * Return pfn of first free page of memory on a node. PROM may allocate + * data structures on the first couple of pages of the first slot of each + * node. If this is the case, getfirstfree(node) > getslotstart(node, 0). + */ +unsigned long node_getfirstfree(cnodeid_t cnode) +{ + unsigned long loadbase = REP_BASE; + nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode); + unsigned long offset; + +#ifdef CONFIG_MAPPED_KERNEL + loadbase += 16777216; +#endif + offset = PAGE_ALIGN((unsigned long)(&_end)) - loadbase; + if ((cnode == 0) || (cpumask_test_cpu(cnode, &ktext_repmask))) + return TO_NODE(nasid, offset) >> PAGE_SHIFT; + else + return KDM_TO_PHYS(PAGE_ALIGN(SYMMON_STK_ADDR(nasid, 0))) >> PAGE_SHIFT; +} |