include/debug/icedcc.S

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  *  arch/arm/include/debug/icedcc.S
0004  *
0005  *  Copyright (C) 1994-1999 Russell King
0006  */
0007
0008         @@ debug using ARM EmbeddedICE DCC channel
0009
0010         .macro  addruart, rp, rv, tmp
0011         .endm
0012
0013 #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
0014
0015         .macro  senduart, rd, rx
0016         mcr p14, 0, \rd, c0, c5, 0
0017         .endm
0018
0019         .macro  busyuart, rd, rx
0020 1001:
0021         mrc p14, 0, \rx, c0, c1, 0
0022         tst \rx, #0x20000000
0023         beq 1001b
0024         .endm
0025
0026         .macro  waituartcts, rd, rx
0027         .endm
0028
0029         .macro  waituarttxrdy, rd, rx
0030         mov \rd, #0x2000000
0031 1001:
0032         subs    \rd, \rd, #1
0033         bmi 1002f
0034         mrc p14, 0, \rx, c0, c1, 0
0035         tst \rx, #0x20000000
0036         bne 1001b
0037 1002:
0038         .endm
0039
0040 #elif defined(CONFIG_CPU_XSCALE)
0041
0042         .macro  senduart, rd, rx
0043         mcr p14, 0, \rd, c8, c0, 0
0044         .endm
0045
0046         .macro  busyuart, rd, rx
0047 1001:
0048         mrc p14, 0, \rx, c14, c0, 0
0049         tst \rx, #0x10000000
0050         beq 1001b
0051         .endm
0052
0053         .macro  waituartcts, rd, rx
0054         .endm
0055
0056         .macro  waituarttxrdy, rd, rx
0057         mov \rd, #0x10000000
0058 1001:
0059         subs    \rd, \rd, #1
0060         bmi 1002f
0061         mrc p14, 0, \rx, c14, c0, 0
0062         tst \rx, #0x10000000
0063         bne 1001b
0064 1002:
0065         .endm
0066
0067 #else
0068
0069         .macro  senduart, rd, rx
0070         mcr p14, 0, \rd, c1, c0, 0
0071         .endm
0072
0073         .macro  busyuart, rd, rx
0074 1001:
0075         mrc p14, 0, \rx, c0, c0, 0
0076         tst \rx, #2
0077         beq 1001b
0078
0079         .endm
0080
0081         .macro  waituartcts, rd, rx
0082         .endm
0083
0084         .macro  waituarttxrdy, rd, rx
0085         mov \rd, #0x2000000
0086 1001:
0087         subs    \rd, \rd, #1
0088         bmi 1002f
0089         mrc p14, 0, \rx, c0, c0, 0
0090         tst \rx, #2
0091         bne 1001b
0092 1002:
0093         .endm
0094
0095 #endif  /* CONFIG_CPU_V6 */