From: duhuanpeng <[email protected]> add a parameters for the assembly version for passing divisor, and set the default value to DEBUG_LL_UART_ADDR when no parameter is given. now it is possiable to recalculate divisor in runtime to keep the baudrate unchanged. when pll settings changed outside of barebox. e.g. jtag.
Signed-off-by: duhuanpeng <[email protected]> --- arch/mips/include/asm/debug_ll_ns16550.h | 4 ++-- arch/riscv/include/asm/debug_ll_ns16550.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/mips/include/asm/debug_ll_ns16550.h b/arch/mips/include/asm/debug_ll_ns16550.h index df58c4c..703bfae 100644 --- a/arch/mips/include/asm/debug_ll_ns16550.h +++ b/arch/mips/include/asm/debug_ll_ns16550.h @@ -58,14 +58,14 @@ static inline void PUTC_LL(char ch) * Macros for use in assembly language code */ -.macro debug_ll_ns16550_init +.macro debug_ll_ns16550_init divisor=DEBUG_LL_UART_DIVISOR #ifdef CONFIG_DEBUG_LL la t0, DEBUG_LL_UART_ADDR li t1, UART_LCR_DLAB /* DLAB on */ sb t1, UART_LCR(t0) /* Write it out */ - li t1, DEBUG_LL_UART_DIVISOR + li t1, \divisor sb t1, UART_DLL(t0) /* write low order byte */ srl t1, t1, 8 sb t1, UART_DLM(t0) /* write high order byte */ diff --git a/arch/riscv/include/asm/debug_ll_ns16550.h b/arch/riscv/include/asm/debug_ll_ns16550.h index e891cbd..f1c2ccb 100644 --- a/arch/riscv/include/asm/debug_ll_ns16550.h +++ b/arch/riscv/include/asm/debug_ll_ns16550.h @@ -88,14 +88,14 @@ static inline void debug_ll_ns16550_init(void) * Macros for use in assembly language code */ -.macro debug_ll_ns16550_init +.macro debug_ll_ns16550_init divisor=DEBUG_LL_UART_DIVISOR #ifdef CONFIG_DEBUG_LL li t0, DEBUG_LL_UART_ADDR li t1, UART_LCR_DLAB /* DLAB on */ UART_REG_S t1, UART_LCR(t0) /* Write it out */ - li t1, DEBUG_LL_UART_DIVISOR + li t1, \divisor UART_REG_S t1, UART_DLL(t0) /* write low order byte */ srl t1, t1, 8 UART_REG_S t1, UART_DLM(t0) /* write high order byte */ -- 2.7.4 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
