diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/include/debug/renesas-scif.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/arm/include/debug/renesas-scif.S b/arch/arm/include/debug/renesas-scif.S new file mode 100644 index 000000000..8e433e981 --- /dev/null +++ b/arch/arm/include/debug/renesas-scif.S @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Renesas SCIF(A) debugging macro include header + * + * Based on r8a7790.S + * + * Copyright (C) 2012-2013 Renesas Electronics Corporation + * Copyright (C) 1994-1999 Russell King + */ + +#define SCIF_PHYS CONFIG_DEBUG_UART_PHYS +#define SCIF_VIRT ((SCIF_PHYS & 0x00ffffff) | 0xfd000000) + +#if defined(CONFIG_DEBUG_R7S9210_SCIF2) || defined(CONFIG_DEBUG_R7S9210_SCIF4) +/* RZ/A2 SCIFA */ +#define FTDR 0x06 +#define FSR 0x08 +#elif CONFIG_DEBUG_UART_PHYS < 0xe6e00000 +/* SCIFA */ +#define FTDR 0x20 +#define FSR 0x14 +#else +/* SCIF */ +#define FTDR 0x0c +#define FSR 0x10 +#endif + +#define TDFE (1 << 5) +#define TEND (1 << 6) + + .macro addruart, rp, rv, tmp + ldr \rp, =SCIF_PHYS + ldr \rv, =SCIF_VIRT + .endm + + .macro waituartcts,rd,rx + .endm + + .macro waituarttxrdy, rd, rx +1001: ldrh \rd, [\rx, #FSR] + tst \rd, #TDFE + beq 1001b + .endm + + .macro senduart, rd, rx + strb \rd, [\rx, #FTDR] + ldrh \rd, [\rx, #FSR] + bic \rd, \rd, #TEND + strh \rd, [\rx, #FSR] + .endm + + .macro busyuart, rd, rx +1001: ldrh \rd, [\rx, #FSR] + tst \rd, #TEND + beq 1001b + .endm |