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author | Jonathan Neuschäfer <j.neuschaefer@gmx.net> | 2016-06-10 19:35:16 +0200 |
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committer | Martin Roth <martinroth@google.com> | 2016-06-12 12:43:37 +0200 |
commit | d15e9aaa48d4382de827522c1020edc63fb135f2 (patch) | |
tree | 65b1a1efcfd6ab64ff8253fc3adacce07f5d1140 /src/mainboard/emulation/spike-riscv/uart.c | |
parent | 1282b8d99692ddfff5b78b03938b9b3555b17c00 (diff) | |
download | coreboot-d15e9aaa48d4382de827522c1020edc63fb135f2.tar.xz |
riscv-spike: Replace custom UART with a memory-mapped 8250
Since the HTIF is a non-standard interface, and coreboot already has a
8250 driver, I started implementing an 8250 core for spike[1].
[1]: https://github.com/riscv/riscv-isa-sim/pull/53
Change-Id: I84adc1169474baa8cc5837358a8ad3d184cfa51b
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/15150
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/mainboard/emulation/spike-riscv/uart.c')
-rw-r--r-- | src/mainboard/emulation/spike-riscv/uart.c | 34 |
1 files changed, 1 insertions, 33 deletions
diff --git a/src/mainboard/emulation/spike-riscv/uart.c b/src/mainboard/emulation/spike-riscv/uart.c index 5983131489..8513849f05 100644 --- a/src/mainboard/emulation/spike-riscv/uart.c +++ b/src/mainboard/emulation/spike-riscv/uart.c @@ -19,39 +19,7 @@ #include <boot/coreboot_tables.h> #include <spike_util.h> -static uint8_t *buf = (void *)0x3f8; uintptr_t uart_platform_base(int idx) { - return (uintptr_t) buf; + return (uintptr_t) 0x40001000; } - -void uart_init(int idx) -{ -} - -unsigned char uart_rx_byte(int idx) -{ - return *buf; // this does not work on spike, requires more implementation details -} - -void uart_tx_byte(int idx, unsigned char data) -{ - mcall_console_putchar(data); -} - -void uart_tx_flush(int idx) -{ -} - -#ifndef __PRE_RAM__ -void uart_fill_lb(void *data) -{ - struct lb_serial serial; - serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED; - serial.baseaddr = 0x3f8; - serial.baud = 115200; - serial.regwidth = 1; - lb_add_serial(&serial, data); - lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data); -} -#endif |