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Kernel/riscv64: Implement debug_output and change cmdline to use it

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Just implementing `debug_output` (and adding "serial_debug" to the
cmdline) makes the kernel print its first assertion failure!
This commit is contained in:
Sönke Holz 2023-11-23 01:36:12 +01:00 • committed by Andrew Kaster
parent dfce2f6341
commit 959f2c0342
2 changed files with 6 additions and 2 deletions
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2
Kernel/Arch/init.cpp
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@ -216,6 +216,8 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init([[maybe_unused]] BootInfo con
multiboot_modules_count = 0; multiboot_modules_count = 0;
// FIXME: Read the /chosen/bootargs property. // FIXME: Read the /chosen/bootargs property.
kernel_cmdline = RPi::Mailbox::the().query_kernel_command_line(s_command_line_buffer); kernel_cmdline = RPi::Mailbox::the().query_kernel_command_line(s_command_line_buffer);
#elif ARCH(RISCV64)
kernel_cmdline = "serial_debug"sv;
#endif #endif
setup_serial_debug(); setup_serial_debug();

6
Kernel/Arch/riscv64/DebugOutput.cpp
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@ -5,13 +5,15 @@
*/ */
#include <Kernel/Arch/DebugOutput.h> #include <Kernel/Arch/DebugOutput.h>
#include <Kernel/Arch/riscv64/SBI.h>
#include <Kernel/Library/Assertions.h> #include <Kernel/Library/Assertions.h>
namespace Kernel { namespace Kernel {
void debug_output(char) void debug_output(char c)
{ {
TODO_RISCV64(); // FIXME: add extension probing support to SBI.cpp to check which debug console extensions are available
(void)SBI::Legacy::console_putchar(c);
} }
} }