From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/mips/au1000/common/dbg_io.c | 122 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 arch/mips/au1000/common/dbg_io.c (limited to 'arch/mips/au1000/common/dbg_io.c') diff --git a/arch/mips/au1000/common/dbg_io.c b/arch/mips/au1000/common/dbg_io.c new file mode 100644 index 00000000000..7bc768e558d --- /dev/null +++ b/arch/mips/au1000/common/dbg_io.c @@ -0,0 +1,122 @@ + +#include +#include +#include + +#ifdef CONFIG_KGDB + +/* + * FIXME the user should be able to select the + * uart to be used for debugging. + */ +#define DEBUG_BASE UART_DEBUG_BASE +/**/ + +/* we need uint32 uint8 */ +/* #include "types.h" */ +typedef unsigned char uint8; +typedef unsigned int uint32; + +#define UART16550_BAUD_2400 2400 +#define UART16550_BAUD_4800 4800 +#define UART16550_BAUD_9600 9600 +#define UART16550_BAUD_19200 19200 +#define UART16550_BAUD_38400 38400 +#define UART16550_BAUD_57600 57600 +#define UART16550_BAUD_115200 115200 + +#define UART16550_PARITY_NONE 0 +#define UART16550_PARITY_ODD 0x08 +#define UART16550_PARITY_EVEN 0x18 +#define UART16550_PARITY_MARK 0x28 +#define UART16550_PARITY_SPACE 0x38 + +#define UART16550_DATA_5BIT 0x0 +#define UART16550_DATA_6BIT 0x1 +#define UART16550_DATA_7BIT 0x2 +#define UART16550_DATA_8BIT 0x3 + +#define UART16550_STOP_1BIT 0x0 +#define UART16550_STOP_2BIT 0x4 + + +#define UART_RX 0 /* Receive buffer */ +#define UART_TX 4 /* Transmit buffer */ +#define UART_IER 8 /* Interrupt Enable Register */ +#define UART_IIR 0xC /* Interrupt ID Register */ +#define UART_FCR 0x10 /* FIFO Control Register */ +#define UART_LCR 0x14 /* Line Control Register */ +#define UART_MCR 0x18 /* Modem Control Register */ +#define UART_LSR 0x1C /* Line Status Register */ +#define UART_MSR 0x20 /* Modem Status Register */ +#define UART_CLK 0x28 /* Baud Rat4e Clock Divider */ +#define UART_MOD_CNTRL 0x100 /* Module Control */ + +/* memory-mapped read/write of the port */ +#define UART16550_READ(y) (au_readl(DEBUG_BASE + y) & 0xff) +#define UART16550_WRITE(y,z) (au_writel(z&0xff, DEBUG_BASE + y)) + +extern unsigned long get_au1x00_uart_baud_base(void); +extern unsigned long cal_r4koff(void); + +void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop) +{ + + if (UART16550_READ(UART_MOD_CNTRL) != 0x3) { + UART16550_WRITE(UART_MOD_CNTRL, 3); + } + cal_r4koff(); + + /* disable interrupts */ + UART16550_WRITE(UART_IER, 0); + + /* set up baud rate */ + { + uint32 divisor; + + /* set divisor */ + divisor = get_au1x00_uart_baud_base() / baud; + UART16550_WRITE(UART_CLK, divisor & 0xffff); + } + + /* set data format */ + UART16550_WRITE(UART_LCR, (data | parity | stop)); +} + +static int remoteDebugInitialized = 0; + +uint8 getDebugChar(void) +{ + if (!remoteDebugInitialized) { + remoteDebugInitialized = 1; + debugInit(UART16550_BAUD_115200, + UART16550_DATA_8BIT, + UART16550_PARITY_NONE, + UART16550_STOP_1BIT); + } + + while((UART16550_READ(UART_LSR) & 0x1) == 0); + return UART16550_READ(UART_RX); +} + + +int putDebugChar(uint8 byte) +{ +// int i; + + if (!remoteDebugInitialized) { + remoteDebugInitialized = 1; + debugInit(UART16550_BAUD_115200, + UART16550_DATA_8BIT, + UART16550_PARITY_NONE, + UART16550_STOP_1BIT); + } + + while ((UART16550_READ(UART_LSR)&0x40) == 0); + UART16550_WRITE(UART_TX, byte); + //for (i=0;i<0xfff;i++); + + return 1; +} + +#endif -- cgit v1.2.3