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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sti.S (1022B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * arch/arm/include/debug/sti.S
      4 *
      5 * Debugging macro include header
      6 * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
      7 */
      8
      9#define ASC_TX_BUF_OFF  0x04
     10#define ASC_CTRL_OFF    0x0c
     11#define ASC_STA_OFF     0x14
     12
     13#define ASC_STA_TX_FULL         (1<<9)
     14#define ASC_STA_TX_EMPTY        (1<<1)
     15
     16
     17		.macro	addruart, rp, rv, tmp
     18		ldr	\rp,      =CONFIG_DEBUG_UART_PHYS	@ physical base
     19		ldr	\rv,      =CONFIG_DEBUG_UART_VIRT	@ virt base
     20		.endm
     21
     22                .macro  senduart,rd,rx
     23                strb    \rd, [\rx, #ASC_TX_BUF_OFF]
     24                .endm
     25
     26		.macro	waituartcts,rd,rx
     27		.endm
     28
     29                .macro  waituarttxrdy,rd,rx
     301001:           ldr     \rd, [\rx, #ASC_STA_OFF]
     31                tst     \rd, #ASC_STA_TX_FULL
     32                bne     1001b
     33                .endm
     34
     35                .macro  busyuart,rd,rx
     361001:           ldr     \rd, [\rx, #ASC_STA_OFF]
     37                tst     \rd, #ASC_STA_TX_EMPTY
     38                beq     1001b
     39                .endm