cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sn_sal.h (3481B)


      1#ifndef _ASM_IA64_SN_SN_SAL_H
      2#define _ASM_IA64_SN_SN_SAL_H
      3
      4/*
      5 * System Abstraction Layer definitions for IA64
      6 *
      7 * This file is subject to the terms and conditions of the GNU General Public
      8 * License.  See the file "COPYING" in the main directory of this archive
      9 * for more details.
     10 *
     11 * Copyright (c) 2000-2006 Silicon Graphics, Inc.  All rights reserved.
     12 */
     13
     14#include <linux/types.h>
     15#include <asm/sal.h>
     16
     17// SGI Specific Calls
     18#define  SN_SAL_GET_PARTITION_ADDR		   0x02000009
     19#define  SN_SAL_MEMPROTECT                         0x0200003e
     20
     21#define  SN_SAL_WATCHLIST_ALLOC			   0x02000070
     22#define  SN_SAL_WATCHLIST_FREE			   0x02000071
     23
     24/*
     25 * SAL Error Codes
     26 */
     27#define SALRET_MORE_PASSES	1
     28#define SALRET_OK		0
     29#define SALRET_NOT_IMPLEMENTED	(-1)
     30#define SALRET_INVALID_ARG	(-2)
     31#define SALRET_ERROR		(-3)
     32
     33/*
     34 * Returns the physical address of the partition's reserved page through
     35 * an iterative number of calls.
     36 *
     37 * On first call, 'cookie' and 'len' should be set to 0, and 'addr'
     38 * set to the nasid of the partition whose reserved page's address is
     39 * being sought.
     40 * On subsequent calls, pass the values, that were passed back on the
     41 * previous call.
     42 *
     43 * While the return status equals SALRET_MORE_PASSES, keep calling
     44 * this function after first copying 'len' bytes starting at 'addr'
     45 * into 'buf'. Once the return status equals SALRET_OK, 'addr' will
     46 * be the physical address of the partition's reserved page. If the
     47 * return status equals neither of these, an error as occurred.
     48 */
     49static inline s64
     50sn_partition_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
     51{
     52	struct ia64_sal_retval rv;
     53	ia64_sal_oemcall_reentrant(&rv, SN_SAL_GET_PARTITION_ADDR, *cookie,
     54				   *addr, buf, *len, 0, 0, 0);
     55	*cookie = rv.v0;
     56	*addr = rv.v1;
     57	*len = rv.v2;
     58	return rv.status;
     59}
     60
     61/*
     62 * Change memory access protections for a physical address range.
     63 * nasid_array is not used on Altix, but may be in future architectures.
     64 * Available memory protection access classes are defined after the function.
     65 */
     66static inline int
     67sn_change_memprotect(u64 paddr, u64 len, u64 perms, u64 *nasid_array)
     68{
     69	struct ia64_sal_retval ret_stuff;
     70
     71	ia64_sal_oemcall_nolock(&ret_stuff, SN_SAL_MEMPROTECT, paddr, len,
     72				(u64)nasid_array, perms, 0, 0, 0);
     73	return ret_stuff.status;
     74}
     75#define SN_MEMPROT_ACCESS_CLASS_0		0x14a080
     76#define SN_MEMPROT_ACCESS_CLASS_1		0x2520c2
     77#define SN_MEMPROT_ACCESS_CLASS_2		0x14a1ca
     78#define SN_MEMPROT_ACCESS_CLASS_3		0x14a290
     79#define SN_MEMPROT_ACCESS_CLASS_6		0x084080
     80#define SN_MEMPROT_ACCESS_CLASS_7		0x021080
     81
     82union sn_watchlist_u {
     83	u64     val;
     84	struct {
     85		u64	blade	: 16,
     86			size	: 32,
     87			filler	: 16;
     88	};
     89};
     90
     91static inline int
     92sn_mq_watchlist_alloc(int blade, void *mq, unsigned int mq_size,
     93				unsigned long *intr_mmr_offset)
     94{
     95	struct ia64_sal_retval rv;
     96	unsigned long addr;
     97	union sn_watchlist_u size_blade;
     98	int watchlist;
     99
    100	addr = (unsigned long)mq;
    101	size_blade.size = mq_size;
    102	size_blade.blade = blade;
    103
    104	/*
    105	 * bios returns watchlist number or negative error number.
    106	 */
    107	ia64_sal_oemcall_nolock(&rv, SN_SAL_WATCHLIST_ALLOC, addr,
    108			size_blade.val, (u64)intr_mmr_offset,
    109			(u64)&watchlist, 0, 0, 0);
    110	if (rv.status < 0)
    111		return rv.status;
    112
    113	return watchlist;
    114}
    115
    116static inline int
    117sn_mq_watchlist_free(int blade, int watchlist_num)
    118{
    119	struct ia64_sal_retval rv;
    120	ia64_sal_oemcall_nolock(&rv, SN_SAL_WATCHLIST_FREE, blade,
    121			watchlist_num, 0, 0, 0, 0, 0);
    122	return rv.status;
    123}
    124#endif /* _ASM_IA64_SN_SN_SAL_H */