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 #include <asm/system.h> 14 15 16 /* 17 * CPU-specific data structure. 18 * 19 * One of these structures is allocated for each cpu of a NUMA system. 20 * 21 * This structure provides a convenient way of keeping together 22 * all SN per-cpu data structures. 23 */ 24 25 typedef struct pda_s { 26 27 /* 28 * Support for SN LEDs 29 */ 30 volatile short *led_address; 31 u8 led_state; 32 u8 hb_state; /* supports blinking heartbeat leds */ 33 unsigned int hb_count; 34 35 unsigned int idle_flag; 36 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; 41 42 unsigned long sn_in_service_ivecs[4]; 43 int sn_lb_int_war_ticks; 44 int sn_last_irq; 45 int sn_first_irq; 46 } pda_t; 47 48 49 #define CACHE_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1)) 50 51 /* 52 * PDA 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. 58 * 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. 62 */ 63 DECLARE_PER_CPU(struct pda_s, pda_percpu); 64 65 #define pda (&__ia64_per_cpu_var(pda_percpu)) 66 67 #define pdacpu(cpu) (&per_cpu(pda_percpu, cpu)) 68 69 #endif /* _ASM_IA64_SN_PDA_H */ 70