2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
8 #ifndef _ASM_IA64_SN_PDA_H
9 #define _ASM_IA64_SN_PDA_H
11 #include <linux/cache.h>
12 #include <asm/percpu.h>
13 #include <asm/system.h>
17 * CPU-specific data structure.
19 * One of these structures is allocated for each cpu of a NUMA system.
21 * This structure provides a convenient way of keeping together
22 * all SN per-cpu data structures.
25 typedef struct pda_s {
30 volatile short *led_address;
32 u8 hb_state; /* supports blinking heartbeat leds */
33 unsigned int hb_count;
35 unsigned int idle_flag;
37 volatile unsigned long *bedrock_rev_id;
38 volatile unsigned long *pio_write_status_addr;
39 unsigned long pio_write_status_val;
40 volatile unsigned long *pio_shub_war_cam_addr;
42 unsigned long sn_in_service_ivecs[4];
43 int sn_lb_int_war_ticks;
49 #define CACHE_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
53 * Per-cpu private data area for each cpu. The PDA is located immediately after
54 * the IA64 cpu_data area. A full page is allocated for the cp_data area for each
55 * cpu but only a small amout of the page is actually used. We put the SNIA PDA
56 * in the same page as the cpu_data area. Note that there is a check in the setup
57 * code to verify that we don't overflow the page.
59 * Seems like we should should cache-line align the pda so that any changes in the
60 * size of the cpu_data area don't change cache layout. Should we align to 32, 64, 128
61 * or 512 boundary. Each has merits. For now, pick 128 but should be revisited later.
63 DECLARE_PER_CPU(struct pda_s, pda_percpu);
65 #define pda (&__ia64_per_cpu_var(pda_percpu))
67 #define pdacpu(cpu) (&per_cpu(pda_percpu, cpu))
69 #endif /* _ASM_IA64_SN_PDA_H */