ARM: i.MX8M: bundle imx-scratch code

The scatch code spread over the code base which is ok as long as we use
it for the bootrom-log only.

This commit bundles the scratch code into a own module to make it easier
to adapt later on and to make the scratch space independent of
CONFIG_ARCH_IMX_ROMAPI.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Link: https://lore.barebox.org/20240116170738.209954-3-m.felsch@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

8 files changed, 45 insertions, 29 deletions

diff --git a/arch/arm/boards/tqmba9xxxca/lowlevel.c b/arch/arm/boards/tqmba9xxxca/lowlevel.c
index 8207cd9515..0a57d02451 100644
--- a/arch/arm/boards/tqmba9xxxca/lowlevel.c
+++ b/arch/arm/boards/tqmba9xxxca/lowlevel.c
@@ -7,6 +7,7 @@
 #include <asm/barebox-arm.h>
 #include <soc/imx9/ddr.h>
 #include <mach/imx/atf.h>
+#include <mach/imx/xload.h>
 #include <mach/imx/romapi.h>
 
 extern char __dtb_z_imx93_tqma9352_mba93xxca_start[];
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 3a51ae8781..9505cffa81 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -17,7 +17,7 @@ CFLAGS_imx6.o := -march=armv7-a
 lwl-$(CONFIG_ARCH_IMX6) += imx6-mmdc.o
 obj-$(CONFIG_ARCH_IMX7) += imx7.o
 obj-$(CONFIG_ARCH_VF610) += vf610.o
-obj-pbl-$(CONFIG_ARCH_IMX8M) += imx8m.o
+obj-pbl-$(CONFIG_ARCH_IMX8M) += imx8m.o scratch.o
 obj-$(CONFIG_ARCH_IMX9) += imx9.o
 lwl-$(CONFIG_ARCH_IMX_ATF) += atf.o
 obj-pbl-$(CONFIG_ARCH_IMX8M) += tzasc.o
diff --git a/arch/arm/mach-imx/romapi.c b/arch/arm/mach-imx/romapi.c
index 6d47f3c6d4..e11f382024 100644
--- a/arch/arm/mach-imx/romapi.c
+++ b/arch/arm/mach-imx/romapi.c
@@ -228,14 +228,6 @@ const u32 *imx8m_get_bootrom_log(void)
 	return NULL;
 }
 
-static int imx8m_reserve_scratch_area(void)
-{
-	return PTR_ERR_OR_ZERO(request_sdram_region("scratch area",
-				    (ulong)arm_mem_scratch_get(),
-				    sizeof(struct imx_scratch_space)));
-}
-device_initcall(imx8m_reserve_scratch_area);
-
 void imx8m_save_bootrom_log(void *dest)
 {
 	const u32 *rom_log;
diff --git a/arch/arm/mach-imx/scratch.c b/arch/arm/mach-imx/scratch.c
new file mode 100644
index 0000000000..0828b55ff8
--- /dev/null
+++ b/arch/arm/mach-imx/scratch.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <asm/barebox-arm.h>
+#include <init.h>
+#include <linux/err.h>
+#include <mach/imx/imx8m-regs.h>
+#include <mach/imx/esdctl.h>
+#include <mach/imx/scratch.h>
+#include <memory.h>
+
+struct imx_scratch_space *__imx8m_scratch_space(int ddr_buswidth)
+{
+	ulong endmem = MX8M_DDR_CSD1_BASE_ADDR +
+		imx8m_barebox_earlymem_size(ddr_buswidth);
+
+	return (void *)arm_mem_scratch(endmem);
+}
+
+static int imx8m_reserve_scratch_area(void)
+{
+	return PTR_ERR_OR_ZERO(request_sdram_region("scratch area",
+				    (ulong)arm_mem_scratch_get(),
+				    sizeof(struct imx_scratch_space)));
+}
+device_initcall(imx8m_reserve_scratch_area);
diff --git a/arch/arm/mach-imx/xload-common.c b/arch/arm/mach-imx/xload-common.c
index e7f8f162ee..025d87fffc 100644
--- a/arch/arm/mach-imx/xload-common.c
+++ b/arch/arm/mach-imx/xload-common.c
@@ -21,14 +21,6 @@ int piggydata_size(void)
 	return input_data_end - input_data;
 }
 
-struct imx_scratch_space *__imx8m_scratch_space(int ddr_buswidth)
-{
-	ulong endmem = MX8M_DDR_CSD1_BASE_ADDR +
-		imx8m_barebox_earlymem_size(ddr_buswidth);
-
-	return (void *)arm_mem_scratch(endmem);
-}
-
 #define HDR_SIZE	512
 
 static int
diff --git a/include/mach/imx/romapi.h b/include/mach/imx/romapi.h
index 05932fac88..710068a8d4 100644
--- a/include/mach/imx/romapi.h
+++ b/include/mach/imx/romapi.h
@@ -2,7 +2,7 @@
 #ifndef __MACH_IMX_ROMAPI_H
 #define __MACH_IMX_ROMAPI_H
 
-#include <mach/imx/xload.h>
+#include <mach/imx/scratch.h>
 #include <linux/types.h>
 
 struct rom_api {
diff --git a/include/mach/imx/scratch.h b/include/mach/imx/scratch.h
new file mode 100644
index 0000000000..6dcf35750c
--- /dev/null
+++ b/include/mach/imx/scratch.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MACH_IMX_SCRATCH_H
+#define __MACH_IMX_SCRATCH_H
+
+struct imx_scratch_space {
+	u32 bootrom_log[128];
+};
+
+struct imx_scratch_space *__imx8m_scratch_space(int ddr_buswidth);
+
+#define imx8mq_scratch_space() __imx8m_scratch_space(32)
+#define imx8mm_scratch_space() __imx8m_scratch_space(32)
+#define imx8mn_scratch_space() __imx8m_scratch_space(16)
+#define imx8mp_scratch_space() __imx8m_scratch_space(32)
+
+#endif /* __MACH_IMX_SCRATCH_H */
diff --git a/include/mach/imx/xload.h b/include/mach/imx/xload.h
index 66219f9fef..99f526d38b 100644
--- a/include/mach/imx/xload.h
+++ b/include/mach/imx/xload.h
@@ -45,15 +45,4 @@ int piggydata_size(void);
 extern unsigned char input_data[];
 extern unsigned char input_data_end[];
 
-struct imx_scratch_space {
-	u32 bootrom_log[128];
-};
-
-struct imx_scratch_space *__imx8m_scratch_space(int ddr_buswidth);
-
-#define imx8mq_scratch_space() __imx8m_scratch_space(32)
-#define imx8mm_scratch_space() __imx8m_scratch_space(32)
-#define imx8mn_scratch_space() __imx8m_scratch_space(16)
-#define imx8mp_scratch_space() __imx8m_scratch_space(32)
-
 #endif /* __MACH_IMX_XLOAD_H */