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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 STIH41X_COMMS_BASE 0xfed00000 | |
10 | #define STIH41X_ASC2_BASE (STIH41X_COMMS_BASE+0x32000) | |
11 | ||
12 | #define STIH41X_SBC_LPM_BASE 0xfe400000 | |
13 | #define STIH41X_SBC_COMMS_BASE (STIH41X_SBC_LPM_BASE + 0x100000) | |
14 | #define STIH41X_SBC_ASC1_BASE (STIH41X_SBC_COMMS_BASE + 0x31000) | |
15 | ||
16 | ||
17 | #define VIRT_ADDRESS(x) (x - 0x1000000) | |
18 | ||
19 | #if IS_ENABLED(CONFIG_STIH41X_DEBUG_ASC2) | |
20 | #define DEBUG_LL_UART_BASE STIH41X_ASC2_BASE | |
21 | #endif | |
22 | ||
23 | #if IS_ENABLED(CONFIG_STIH41X_DEBUG_SBC_ASC1) | |
24 | #define DEBUG_LL_UART_BASE STIH41X_SBC_ASC1_BASE | |
25 | #endif | |
26 | ||
27 | #ifndef DEBUG_LL_UART_BASE | |
28 | #error "DEBUG UART is not Configured" | |
29 | #endif | |
30 | ||
31 | #define ASC_TX_BUF_OFF 0x04 | |
32 | #define ASC_CTRL_OFF 0x0c | |
33 | #define ASC_STA_OFF 0x14 | |
34 | ||
35 | #define ASC_STA_TX_FULL (1<<9) | |
36 | #define ASC_STA_TX_EMPTY (1<<1) | |
37 | ||
38 | ||
39 | .macro addruart, rp, rv, tmp | |
40 | ldr \rp, =DEBUG_LL_UART_BASE @ physical base | |
41 | ldr \rv, =VIRT_ADDRESS(DEBUG_LL_UART_BASE) @ virt base | |
42 | .endm | |
43 | ||
44 | .macro senduart,rd,rx | |
45 | strb \rd, [\rx, #ASC_TX_BUF_OFF] | |
46 | .endm | |
47 | ||
48 | .macro waituart,rd,rx | |
49 | 1001: ldr \rd, [\rx, #ASC_STA_OFF] | |
50 | tst \rd, #ASC_STA_TX_FULL | |
51 | bne 1001b | |
52 | .endm | |
53 | ||
54 | .macro busyuart,rd,rx | |
55 | 1001: ldr \rd, [\rx, #ASC_STA_OFF] | |
56 | tst \rd, #ASC_STA_TX_EMPTY | |
57 | beq 1001b | |
58 | .endm |