diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c
index ae0b2c9b70a0..96e9b058aa1d 100644
--- a/arch/sh/drivers/pci/pcie-sh7786.c
+++ b/arch/sh/drivers/pci/pcie-sh7786.c
@@ -446,9 +446,9 @@ static int __init pcie_init(struct sh7786_pcie_port *port)
 		mask = (roundup_pow_of_two(size) / SZ_256K) - 1;
 		pci_write_reg(chan, mask << 18, SH4A_PCIEPAMR(win));
 
-		pci_write_reg(chan, RES_TO_U32_HIGH(res->start),
+		pci_write_reg(chan, upper_32_bits(res->start),
 			      SH4A_PCIEPARH(win));
-		pci_write_reg(chan, RES_TO_U32_LOW(res->start),
+		pci_write_reg(chan, lower_32_bits(res->start),
 			      SH4A_PCIEPARL(win));
 
 		mask = MASK_PARE;
diff --git a/arch/sh/drivers/pci/pcie-sh7786.h b/arch/sh/drivers/pci/pcie-sh7786.h
index a2a0ca6e7cca..1ee054e47eae 100644
--- a/arch/sh/drivers/pci/pcie-sh7786.h
+++ b/arch/sh/drivers/pci/pcie-sh7786.h
@@ -568,13 +568,6 @@
 
 #define PCI_REG(x)		((x) + 0x40000)
 
-#define U64_TO_U32_LOW(val)	((u32)((val) & 0x00000000ffffffffULL))
-#define U64_TO_U32_HIGH(val)	((u32)((val) >> 32))
-#define RES_TO_U32_LOW(val)     \
-	((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_LOW(val) : (val))
-#define RES_TO_U32_HIGH(val)    \
-	((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_HIGH(val) : (0))
-
 static inline void
 pci_write_reg(struct pci_channel *chan, unsigned long val, unsigned long reg)
 {