1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/kernel.h>
 3#include <linux/types.h>
 4#include <linux/mutex.h>
 5#include <linux/cpu.h>
 6
 7#include <linux/jump_label.h>
 8#include <linux/memory.h>
 9
10#include <asm/cacheflush.h>
11
12#ifdef HAVE_JUMP_LABEL
13
14void arch_jump_label_transform(struct jump_entry *entry,
15			       enum jump_label_type type)
16{
17	u32 *insn = (u32 *) (unsigned long) entry->code;
18	u32 val;
19
20	if (type == JUMP_LABEL_JMP) {
21		s32 off = (s32)entry->target - (s32)entry->code;
22		bool use_v9_branch = false;
23
24		BUG_ON(off & 3);
25
26#ifdef CONFIG_SPARC64
27		if (off <= 0xfffff && off >= -0x100000)
28			use_v9_branch = true;
29#endif
30		if (use_v9_branch) {
31			/* WDISP19 - target is . + immed << 2 */
32			/* ba,pt %xcc, . + off */
33			val = 0x10680000 | (((u32) off >> 2) & 0x7ffff);
34		} else {
35			/* WDISP22 - target is . + immed << 2 */
36			BUG_ON(off > 0x7fffff);
37			BUG_ON(off < -0x800000);
38			/* ba . + off */
39			val = 0x10800000 | (((u32) off >> 2) & 0x3fffff);
40		}
41	} else {
42		val = 0x01000000;
43	}
44
45	mutex_lock(&text_mutex);
46	*insn = val;
47	flushi(insn);
48	mutex_unlock(&text_mutex);
49}
50
51#endif

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/kernel.h>
 3#include <linux/types.h>
 4#include <linux/mutex.h>
 5#include <linux/cpu.h>
 6
 7#include <linux/jump_label.h>
 8#include <linux/memory.h>
 9
10#include <asm/cacheflush.h>
11
 
 
12void arch_jump_label_transform(struct jump_entry *entry,
13			       enum jump_label_type type)
14{
15	u32 *insn = (u32 *) (unsigned long) entry->code;
16	u32 val;
17
18	if (type == JUMP_LABEL_JMP) {
19		s32 off = (s32)entry->target - (s32)entry->code;
20		bool use_v9_branch = false;
21
22		BUG_ON(off & 3);
23
24#ifdef CONFIG_SPARC64
25		if (off <= 0xfffff && off >= -0x100000)
26			use_v9_branch = true;
27#endif
28		if (use_v9_branch) {
29			/* WDISP19 - target is . + immed << 2 */
30			/* ba,pt %xcc, . + off */
31			val = 0x10680000 | (((u32) off >> 2) & 0x7ffff);
32		} else {
33			/* WDISP22 - target is . + immed << 2 */
34			BUG_ON(off > 0x7fffff);
35			BUG_ON(off < -0x800000);
36			/* ba . + off */
37			val = 0x10800000 | (((u32) off >> 2) & 0x3fffff);
38		}
39	} else {
40		val = 0x01000000;
41	}
42
43	mutex_lock(&text_mutex);
44	*insn = val;
45	flushi(insn);
46	mutex_unlock(&text_mutex);
47}