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39 lines
1022 B
39 lines
1022 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* arch/arm/include/debug/sti.S |
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* |
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* Debugging macro include header |
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* Copyright (C) 2013 STMicroelectronics (R&D) Limited. |
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*/ |
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#define ASC_TX_BUF_OFF 0x04 |
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#define ASC_CTRL_OFF 0x0c |
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#define ASC_STA_OFF 0x14 |
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#define ASC_STA_TX_FULL (1<<9) |
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#define ASC_STA_TX_EMPTY (1<<1) |
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.macro addruart, rp, rv, tmp |
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ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base |
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ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base |
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.endm |
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.macro senduart,rd,rx |
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strb \rd, [\rx, #ASC_TX_BUF_OFF] |
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.endm |
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.macro waituartcts,rd,rx |
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.endm |
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.macro waituarttxrdy,rd,rx |
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1001: ldr \rd, [\rx, #ASC_STA_OFF] |
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tst \rd, #ASC_STA_TX_FULL |
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bne 1001b |
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.endm |
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.macro busyuart,rd,rx |
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1001: ldr \rd, [\rx, #ASC_STA_OFF] |
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tst \rd, #ASC_STA_TX_EMPTY |
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beq 1001b |
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.endm
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