1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * File created by Kanoj Sarcar 06/06/00.
 4 * Copyright 2000 Silicon Graphics, Inc.
 5 */
 6#ifndef __ASM_SN_MAPPED_KERNEL_H
 7#define __ASM_SN_MAPPED_KERNEL_H
 8
 9#include <linux/mmzone.h>
10
11/*
12 * Note on how mapped kernels work: the text and data section is
13 * compiled at cksseg segment (LOADADDR = 0xc001c000), and the
14 * init/setup/data section gets a 16M virtual address bump in the
15 * ld.script file (so that tlblo0 and tlblo1 maps the sections).
16 * The vmlinux.64 section addresses are put in the xkseg range
17 * using the change-addresses makefile option. Use elfdump -of
18 * on IRIX to see where the sections go. The Origin loader loads
19 * the two sections contiguously in physical memory. The loader
20 * sets the entry point into kernel_entry using a xkphys address,
21 * but instead of using 0xa800000001160000, it uses the address
22 * 0xa800000000160000, which is where it physically loaded that
23 * code. So no jumps can be done before we have switched to using
24 * cksseg addresses.
25 */
26#include <asm/addrspace.h>
27
28#define REP_BASE	CAC_BASE
29
30#ifdef CONFIG_MAPPED_KERNEL
31
32#define MAPPED_ADDR_RO_TO_PHYS(x)	(x - REP_BASE)
33#define MAPPED_ADDR_RW_TO_PHYS(x)	(x - REP_BASE - 16777216)
34
35#define MAPPED_KERN_RO_PHYSBASE(n) (hub_data(n)->kern_vars.kv_ro_baseaddr)
36#define MAPPED_KERN_RW_PHYSBASE(n) (hub_data(n)->kern_vars.kv_rw_baseaddr)
37
38#define MAPPED_KERN_RO_TO_PHYS(x) \
39				((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \
40				MAPPED_KERN_RO_PHYSBASE(get_nasid()))
41#define MAPPED_KERN_RW_TO_PHYS(x) \
42				((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \
43				MAPPED_KERN_RW_PHYSBASE(get_nasid()))
44
45#else /* CONFIG_MAPPED_KERNEL */
46
47#define MAPPED_KERN_RO_TO_PHYS(x)	(x - REP_BASE)
48#define MAPPED_KERN_RW_TO_PHYS(x)	(x - REP_BASE)
49
50#endif /* CONFIG_MAPPED_KERNEL */
51
52#define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x))
53#define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x))
54
55#endif /* __ASM_SN_MAPPED_KERNEL_H  */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * File created by Kanoj Sarcar 06/06/00.
 4 * Copyright 2000 Silicon Graphics, Inc.
 5 */
 6#ifndef __ASM_SN_MAPPED_KERNEL_H
 7#define __ASM_SN_MAPPED_KERNEL_H
 8
 9#include <linux/mmzone.h>
10
11/*
12 * Note on how mapped kernels work: the text and data section is
13 * compiled at cksseg segment (LOADADDR = 0xc001c000), and the
14 * init/setup/data section gets a 16M virtual address bump in the
15 * ld.script file (so that tlblo0 and tlblo1 maps the sections).
16 * The vmlinux.64 section addresses are put in the xkseg range
17 * using the change-addresses makefile option. Use elfdump -of
18 * on IRIX to see where the sections go. The Origin loader loads
19 * the two sections contiguously in physical memory. The loader
20 * sets the entry point into kernel_entry using a xkphys address,
21 * but instead of using 0xa800000001160000, it uses the address
22 * 0xa800000000160000, which is where it physically loaded that
23 * code. So no jumps can be done before we have switched to using
24 * cksseg addresses.
25 */
26#include <asm/addrspace.h>
27
28#define REP_BASE	CAC_BASE
29
30#ifdef CONFIG_MAPPED_KERNEL
31
32#define MAPPED_ADDR_RO_TO_PHYS(x)	(x - REP_BASE)
33#define MAPPED_ADDR_RW_TO_PHYS(x)	(x - REP_BASE - 16777216)
34
35#define MAPPED_KERN_RO_PHYSBASE(n) (hub_data(n)->kern_vars.kv_ro_baseaddr)
36#define MAPPED_KERN_RW_PHYSBASE(n) (hub_data(n)->kern_vars.kv_rw_baseaddr)
37
38#define MAPPED_KERN_RO_TO_PHYS(x) \
39				((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \
40				MAPPED_KERN_RO_PHYSBASE(get_compact_nodeid()))
41#define MAPPED_KERN_RW_TO_PHYS(x) \
42				((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \
43				MAPPED_KERN_RW_PHYSBASE(get_compact_nodeid()))
44
45#else /* CONFIG_MAPPED_KERNEL */
46
47#define MAPPED_KERN_RO_TO_PHYS(x)	(x - REP_BASE)
48#define MAPPED_KERN_RW_TO_PHYS(x)	(x - REP_BASE)
49
50#endif /* CONFIG_MAPPED_KERNEL */
51
52#define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x))
53#define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x))
54
55#endif /* __ASM_SN_MAPPED_KERNEL_H  */