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arm: mvebu: Disable MBUS error propagation

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Accessing MBUS windows not backed-up by e.g. PCIe devices will
hang the SoC. Disable MBUS error propagation back to CPU allows
to read 0xffffffff instead of hanging the SoC.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
This commit is contained in:
Stefan Roese 2015-07-01 13:28:39 +02:00 committed by Luka Perkov
parent 2b181b5b04
commit 501c098a1f
2 changed files with 6 additions and 0 deletions
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3
arch/arm/mach-mvebu/cpu.c
View File

@ -241,6 +241,9 @@ int arch_cpu_init(void)
*/
mvebu_mbus_probe(windows, ARRAY_SIZE(windows));
/* Disable MBUS error propagation */
clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0);
return 0;
}
#endif /* CONFIG_ARCH_CPU_INIT */

3
arch/arm/mach-mvebu/include/mach/soc.h
View File

@ -66,6 +66,9 @@
#define MVEBU_SATA0_BASE (MVEBU_REGISTER(0xa8000))
#define MVEBU_SDIO_BASE (MVEBU_REGISTER(0xd8000))
#define SOC_COHERENCY_FABRIC_CTRL_REG (MVEBU_REGISTER(0x20200))
#define MBUS_ERR_PROP_EN (1 << 8)
#define MBUS_BRIDGE_WIN_CTRL_REG (MVEBU_REGISTER(0x20250))
#define MBUS_BRIDGE_WIN_BASE_REG (MVEBU_REGISTER(0x20254))