1/*
 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
 4 * for more details.
 5 *
 6 * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
 7 */
 8#ifndef _ASM_IA64_SN_PDA_H
 9#define _ASM_IA64_SN_PDA_H
10
11#include <linux/cache.h>
12#include <asm/percpu.h>
13
14
15/*
16 * CPU-specific data structure.
17 *
18 * One of these structures is allocated for each cpu of a NUMA system.
19 *
20 * This structure provides a convenient way of keeping together 
21 * all SN per-cpu data structures. 
22 */
23
24typedef struct pda_s {
25
26	/*
27	 * Support for SN LEDs
28	 */
29	volatile short	*led_address;
30	u8		led_state;
31	u8		hb_state;	/* supports blinking heartbeat leds */
32	unsigned int	hb_count;
33
34	unsigned int	idle_flag;
35	
36	volatile unsigned long *bedrock_rev_id;
37	volatile unsigned long *pio_write_status_addr;
38	unsigned long pio_write_status_val;
39	volatile unsigned long *pio_shub_war_cam_addr;
40
41	unsigned long	sn_in_service_ivecs[4];
42	int		sn_lb_int_war_ticks;
43	int		sn_last_irq;
44	int		sn_first_irq;
45} pda_t;
46
47
48#define CACHE_ALIGN(x)	(((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
49
50/*
51 * PDA
52 * Per-cpu private data area for each cpu. The PDA is located immediately after
53 * the IA64 cpu_data area. A full page is allocated for the cp_data area for each
54 * cpu but only a small amout of the page is actually used. We put the SNIA PDA
55 * in the same page as the cpu_data area. Note that there is a check in the setup
56 * code to verify that we don't overflow the page.
57 *
58 * Seems like we should should cache-line align the pda so that any changes in the
59 * size of the cpu_data area don't change cache layout. Should we align to 32, 64, 128
60 * or 512 boundary. Each has merits. For now, pick 128 but should be revisited later.
61 */
62DECLARE_PER_CPU(struct pda_s, pda_percpu);
63
64#define pda		(&__ia64_per_cpu_var(pda_percpu))
65
66#define pdacpu(cpu)	(&per_cpu(pda_percpu, cpu))
67
68#endif /* _ASM_IA64_SN_PDA_H */