[PATCH v2 2/3] arm: mach-imx: set cpu type in pbl

[Stefan Kerkmann <s.kerkmann@pengutronix.de>]

In order to use the `cpu_is_imxxyz` macro family in the pbl,
`__imx_cpu_type` has to be defined and initialized. As we don't have
access to the devicetree at this point, we resort to manual assignment.

Note: It is safe to build the same imx.o object file for both barebox
pbl and proper as the `imx_init` function is discarded during linking as
the whole `init_call` section is not linked into the final binary.

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Stefan Kerkmann <s.kerkmann@pengutronix.de>
---
 arch/arm/mach-imx/Makefile | 2 +-
 arch/arm/mach-imx/atf.c    | 5 +++++
 include/mach/imx/generic.h | 5 +++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index ce8af486ae..a2d9702bf4 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -28,7 +28,7 @@ obj-$(CONFIG_NAND_IMX) += nand.o
 lwl-$(CONFIG_ARCH_IMX_EXTERNAL_BOOT_NAND) += external-nand-boot.o
 obj-y += devices.o imx.o
 obj-$(CONFIG_CMD_BOOTROM) += bootrom-cmd.o
-obj-pbl-y += esdctl.o boot.o
+obj-pbl-y += esdctl.o boot.o imx.o
 obj-$(CONFIG_BAREBOX_UPDATE) += imx-bbu-internal.o
 obj-$(CONFIG_BAREBOX_UPDATE_IMX_EXTERNAL_NAND) += imx-bbu-external-nand.o
 pbl-$(CONFIG_USB_GADGET_DRIVER_ARC_PBL) += imx-udc.o
diff --git a/arch/arm/mach-imx/atf.c b/arch/arm/mach-imx/atf.c
index 2d8388e8e9..e8060ebd95 100644
--- a/arch/arm/mach-imx/atf.c
+++ b/arch/arm/mach-imx/atf.c
@@ -148,6 +148,7 @@ __noreturn void __imx8mm_load_and_start_image_via_tfa(void *bl33)
 	size_t bl31_size;
 	unsigned long endmem = MX8M_DDR_CSD1_BASE_ADDR + imx8m_barebox_earlymem_size(32);
 
+	imx_set_cpu_type(IMX_CPU_IMX8MM);
 	imx8mm_init_scratch_space();
 	imx8m_save_bootrom_log();
 	imx8mm_load_bl33(bl33);
@@ -218,6 +219,7 @@ __noreturn void __imx8mp_load_and_start_image_via_tfa(void *bl33)
 	size_t bl31_size;
 	unsigned long endmem = MX8M_DDR_CSD1_BASE_ADDR + imx8m_barebox_earlymem_size(32);
 
+	imx_set_cpu_type(IMX_CPU_IMX8MP);
 	imx8mp_init_scratch_space();
 	imx8m_save_bootrom_log();
 	imx8mp_load_bl33(bl33);
@@ -289,6 +291,7 @@ __noreturn void __imx8mn_load_and_start_image_via_tfa(void *bl33)
 	size_t bl31_size;
 	unsigned long endmem = MX8M_DDR_CSD1_BASE_ADDR + imx8m_barebox_earlymem_size(16);
 
+	imx_set_cpu_type(IMX_CPU_IMX8MN);
 	imx8mn_init_scratch_space();
 	imx8m_save_bootrom_log();
 	imx8mn_load_bl33(bl33);
@@ -353,6 +356,7 @@ __noreturn void __imx8mq_load_and_start_image_via_tfa(void *bl33)
 	size_t bl31_size;
 	unsigned long endmem = MX8M_DDR_CSD1_BASE_ADDR + imx8m_barebox_earlymem_size(32);
 
+	imx_set_cpu_type(IMX_CPU_IMX8MQ);
 	imx8mq_init_scratch_space();
 	imx8m_save_bootrom_log();
 	imx8mq_load_bl33(bl33);
@@ -388,6 +392,7 @@ void __noreturn imx93_load_and_start_image_via_tfa(void)
 	void *bl33 = (void *)MX93_ATF_BL33_BASE_ADDR;
 	unsigned long endmem = MX9_DDR_CSD1_BASE_ADDR + imx9_ddrc_sdram_size();
 
+	imx_set_cpu_type(IMX_CPU_IMX93);
 	imx93_init_scratch_space(true);
 
 	/*
diff --git a/include/mach/imx/generic.h b/include/mach/imx/generic.h
index 1dca335fdd..2b26a1d45a 100644
--- a/include/mach/imx/generic.h
+++ b/include/mach/imx/generic.h
@@ -82,6 +82,11 @@ void imx93_cpu_lowlevel_init(void);
 
 extern unsigned int __imx_cpu_type;
 
+static __always_inline void imx_set_cpu_type(unsigned int cpu_type)
+{
+	__imx_cpu_type = cpu_type;
+}
+
 #ifdef CONFIG_ARCH_IMX1
 # ifdef imx_cpu_type
 #  undef imx_cpu_type

-- 
2.39.2