From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH] RISC-V: virt: add DEBUG_LL support
Date: Thu, 25 Nov 2021 17:06:57 +0100 [thread overview]
Message-ID: <20211125160657.3828643-1-a.fatoum@pengutronix.de> (raw)
While we have PBL console support, console isn't available during early
barebox startup. Implement DEBUG_LL for Qemu RISC-V Virt to make such
early debugging easier.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
arch/riscv/Kconfig.socs | 1 +
arch/riscv/include/asm/debug_ll.h | 10 ++++++++--
common/Kconfig | 5 +++++
3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index bd4a44a575ef..b12c795041b0 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -18,6 +18,7 @@ config SOC_VIRT
select RISCV_S_MODE
select BOARD_RISCV_GENERIC_DT
select HAS_CACHE
+ select HAS_ASM_DEBUG_LL
help
Generates an image tht can be be booted by QEMU. The image is called
barebox-dt-2nd.img
diff --git a/arch/riscv/include/asm/debug_ll.h b/arch/riscv/include/asm/debug_ll.h
index a3b9c1c4bcfb..d01b4f09b8e1 100644
--- a/arch/riscv/include/asm/debug_ll.h
+++ b/arch/riscv/include/asm/debug_ll.h
@@ -17,13 +17,19 @@
#if defined CONFIG_DEBUG_ERIZO
#define DEBUG_LL_UART_ADDR 0x90000000
#define DEBUG_LL_UART_CLK (24000000 / 16)
+#define DEBUG_LL_UART_SHIFT 2
+#define DEBUG_LL_UART_IOSIZE32
#elif defined CONFIG_DEBUG_STARFIVE
#define DEBUG_LL_UART_ADDR 0x12440000
#define DEBUG_LL_UART_CLK (100000000 / 16)
-#endif
-
#define DEBUG_LL_UART_SHIFT 2
#define DEBUG_LL_UART_IOSIZE32
+#elif defined CONFIG_DEBUG_RISCV_VIRT
+#define DEBUG_LL_UART_ADDR 0x10000000
+#define DEBUG_LL_UART_CLK (58982400 / 16)
+#define DEBUG_LL_UART_SHIFT 0
+#define DEBUG_LL_UART_IOSIZE8
+#endif
#define DEBUG_LL_UART_BPS CONFIG_BAUDRATE
#define DEBUG_LL_UART_DIVISOR (DEBUG_LL_UART_CLK / DEBUG_LL_UART_BPS)
diff --git a/common/Kconfig b/common/Kconfig
index f4120b2083ee..ab6258d90f40 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -1402,6 +1402,11 @@ config DEBUG_STARFIVE
depends on SOC_STARFIVE
select DEBUG_LL_NS16550
+config DEBUG_RISCV_VIRT
+ bool "RISC-V Virt ns16550 port"
+ depends on SOC_VIRT
+ select DEBUG_LL_NS16550
+
config DEBUG_SIFIVE
bool "SiFive serial0 port"
depends on SOC_SIFIVE
--
2.30.2
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next reply other threads:[~2021-11-25 16:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-25 16:06 Ahmad Fatoum [this message]
2021-12-07 9:11 ` Sascha Hauer
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