775a02cf3f
Bring up minos on the Allwinner D1 (Lichee RV) over FEL/xfel and add bidirectional UART so the console can read keystrokes, not just print. D1 / Lichee RV boot: - riscv arch.c: select UART0 base by -DBOARD_D1 (0x02500000 vs QEMU 0x10000000) and add a reg-shift abstraction (uart_rd/uart_wr): the D1's Synopsys DW-8250 uses 32-bit registers at 4-byte spacing, which is what made the first hardware boot silent. - d1_uart0_init(): gate/deassert UART0 clock, mux PB8/PB9 to UART0, set 115200 8N1, clear FIFOs, force non-loopback, drain stale RX. - link-d1.ld: link for DRAM at 0x40000000 (xfel exec target, M-mode). - Makefile: 'lichee' builds the flat binary; 'run-lichee' loads it via xfel (ddr d1 / write / exec). - arch_name() reports the concrete board. UART input (all archs): - arch contract gains arch_uart_getc() and arch_uart_rx_ready(), implemented for riscv, x86 (COM1) and arm (Cadence UART). - console gains getc() and drain_rx(). - kmain() runs an interactive echo loop (seed of the M3 console). Verified: echo works under QEMU on x86/riscv/arm, and on real D1 hardware (banner once, then live keystroke echo over UART0 @115200).
10 lines
170 B
C
10 lines
170 B
C
#ifndef MINOS_CONSOLE_H
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#define MINOS_CONSOLE_H
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void putc(char c);
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void puts(const char *s);
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void puthex(unsigned long v);
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char getc(void);
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void drain_rx(void);
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#endif
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