| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * arch/arm/include/debug/sti.S |
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| 4 | * |
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| 5 | * Debugging macro include header |
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| 6 | * Copyright (C) 2013 STMicroelectronics (R&D) Limited. |
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| 7 | */ |
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| 8 | |
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| 9 | #define ASC_TX_BUF_OFF 0x04 |
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| 10 | #define ASC_CTRL_OFF 0x0c |
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| 11 | #define ASC_STA_OFF 0x14 |
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| 12 | |
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| 13 | #define ASC_STA_TX_FULL (1<<9) |
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| 14 | #define ASC_STA_TX_EMPTY (1<<1) |
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| 15 | |
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| 16 | |
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| 17 | .macro addruart, rp, rv, tmp |
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| 18 | ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base |
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| 19 | ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base |
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| 20 | .endm |
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| 21 | |
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| 22 | .macro senduart,rd,rx |
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| 23 | strb \rd, [\rx, #ASC_TX_BUF_OFF] |
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| 24 | .endm |
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| 25 | |
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| 26 | .macro waituartcts,rd,rx |
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| 27 | .endm |
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| 28 | |
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| 29 | .macro waituarttxrdy,rd,rx |
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| 30 | 1001: ldr \rd, [\rx, #ASC_STA_OFF] |
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| 31 | tst \rd, #ASC_STA_TX_FULL |
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| 32 | bne 1001b |
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| 33 | .endm |
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| 34 | |
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| 35 | .macro busyuart,rd,rx |
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| 36 | 1001: ldr \rd, [\rx, #ASC_STA_OFF] |
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| 37 | tst \rd, #ASC_STA_TX_EMPTY |
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| 38 | beq 1001b |
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| 39 | .endm |
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| 40 | |
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