[PATCH 1/3] ARM: i.MX8M: esdctl: limit i.MX8MP early memory size

[Lucas Stach <l.stach@pengutronix.de>]

Limit detected early memory size to 1GB on i.MX8MP, as the default DT
has a reserved memory region at 0x92400000, which will conflict with
our malloc area in some configurations. Until we can properly parse
and exclude the reserved memory regions in the PBL, just avoid getting
near that DRAM address by limiting the detected size.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 arch/arm/mach-imx/esdctl.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/esdctl.c b/arch/arm/mach-imx/esdctl.c
index a704250297bb..043de477a77d 100644
--- a/arch/arm/mach-imx/esdctl.c
+++ b/arch/arm/mach-imx/esdctl.c
@@ -947,7 +947,17 @@ void __noreturn imx8mn_barebox_entry(void *boarddata)
 
 void __noreturn imx8mp_barebox_entry(void *boarddata)
 {
-	imx8m_barebox_entry(boarddata, 32);
+	/*
+	 * Limit detected early memory size to 1GB on i.MX8MP, as the default
+	 * DT has a reserved memory region at 0x92400000, which will conflict
+	 * with our malloc area in some configurations. Until we can properly
+	 * parse and exclude the reserved memory regions in the PBL, just avoid
+	 * getting near that DRAM address by limiting the detected size.
+	 */
+	barebox_arm_entry(MX8M_DDR_CSD1_BASE_ADDR,
+			  min_t(resource_size_t, SZ_1G,
+				imx8m_barebox_earlymem_size(32)),
+			  boarddata);
 }
 
 void __noreturn imx8mq_barebox_entry(void *boarddata)
-- 
2.39.1