linux/const.h: import from kernel

new file mode 100644
index 000000000000..379c88923269
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _LINUX_CONST_H
+#define _LINUX_CONST_H
+
+/* const.h: Macros for dealing with constants.  */
+
+/* Some constant macros are used in both assembler and
+ * C code.  Therefore we cannot annotate them always with
+ * 'UL' and other type specifiers unilaterally.  We
+ * use the following macros to deal with this.
+ *
+ * Similarly, _AT() will cast an expression with a type in C, but
+ * leave it unchanged in asm.
+ */
+
+#ifdef __ASSEMBLY__
+#define _AC(X,Y)	X
+#define _AT(T,X)	X
+#else
+#define __AC(X,Y)	(X##Y)
+#define _AC(X,Y)	__AC(X,Y)
+#define _AT(T,X)	((T)(X))
+#endif
+
+#define _UL(x)		(_AC(x, UL))
+#define _ULL(x)		(_AC(x, ULL))
+
+#define _BITUL(x)	(_UL(1) << (x))
+#define _BITULL(x)	(_ULL(1) << (x))
+
+#define UL(x)		(_UL(x))
+#define ULL(x)		(_ULL(x))
+
+#endif /* _LINUX_CONST_H */

index 62d00d15c26d..4a573208dfd0 100644
@@ -7,6 +7,8 @@
 #ifndef _ASM_ARMV8_MMU_H_
 #define _ASM_ARMV8_MMU_H_
 
+#include <linux/const.h>
+
 /*
  * block/section address mask and size definitions.
  */

index b7eac323cd67..539d0a566d52 100644
@@ -7,7 +7,7 @@
 #ifndef _ASM_MACH_GENERIC_SPACES_H
 #define _ASM_MACH_GENERIC_SPACES_H
 
-#include <asm/const.h>
+#include <linux/const.h>
 
 /*
  * This gives the physical RAM offset.

index 50fccea5c8f9..29624fdbb555 100644
@@ -8,6 +8,8 @@
 #ifndef _ASM_RISCV_CSR_H
 #define _ASM_RISCV_CSR_H
 
+#include <linux/const.h>
+
 /* Status register flags */
 #define SR_SIE		_AC(0x00000002, UL) /* Supervisor Interrupt Enable */
 #define SR_SPIE		_AC(0x00000020, UL) /* Previous Supervisor IE */

index 83b3bdc58dfa..f3c1de9f1fa2 100644
@@ -14,9 +14,6 @@ typedef volatile unsigned long	vu_long;
 typedef volatile unsigned short vu_short;
 typedef volatile unsigned char	vu_char;
 
-/* Allow sharing constants with type modifiers between C and assembly. */
-#define _AC(X, Y)       (X##Y)
-
 #include <config.h>
 #include <errno.h>
 #include <time.h>

@@ -542,16 +539,10 @@ int cpu_release(u32 nr, int argc, char * const argv[]);
 
 #else	/* __ASSEMBLY__ */
 
-/* Drop a C type modifier (like in 3UL) for constants used in assembly. */
-#define _AC(X, Y)       X
-
 #endif	/* __ASSEMBLY__ */
 
 /* Put only stuff here that the assembler can digest */
 
-/* Declare an unsigned long constant digestable both by C and an assembler. */
-#define UL(x)           _AC(x, UL)
-
 #ifdef CONFIG_POST
 #define CONFIG_HAS_POST
 #ifndef CONFIG_POST_ALT_LIST

deleted file mode 100644
index ed43b5d534ac..000000000000
@@ -1,27 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * const.h: Macros for dealing with constants.
- */
-
-#ifndef _LINUX_CONST_H
-#define _LINUX_CONST_H
-
-/* Some constant macros are used in both assembler and
- * C code.  Therefore we cannot annotate them always with
- * 'UL' and other type specifiers unilaterally.  We
- * use the following macros to deal with this.
- *
- * Similarly, _AT() will cast an expression with a type in C, but
- * leave it unchanged in asm.
- */
-
-#ifdef __ASSEMBLY__
-#define _AT(T,X)	X
-#else
-#define _AT(T,X)	((T)(X))
-#endif
-
-#define _BITUL(x)	(_AC(1,UL) << (x))
-#define _BITULL(x)	(_AC(1,ULL) << (x))
-
-#endif /* !(_LINUX_CONST_H) */

index 5c9467bfe8be..62142821a595 100644
@@ -6,11 +6,10 @@
 #include <common.h>
 #include <fdt_support.h>
 #include <fdtdec.h>
+#include <linux/sizes.h>
 #include <asm/arch/tegra.h>
 #include <asm/armv8/mmu.h>
 
-#define SZ_4G 0x100000000ULL
-
 /*
  * Size of a region that's large enough to hold the relocated U-Boot and all
  * other allocations made around it (stack, heap, page tables, etc.)

index ce3e8150c174..fbde0bc7e882 100644
@@ -8,6 +8,8 @@
 #ifndef __LINUX_SIZES_H__
 #define __LINUX_SIZES_H__
 
+#include <linux/const.h>
+
 #define SZ_1				0x00000001
 #define SZ_2				0x00000002
 #define SZ_4				0x00000004

@@ -44,4 +46,6 @@
 #define SZ_1G				0x40000000
 #define SZ_2G				0x80000000
 
+#define SZ_4G				_AC(0x100000000, ULL)
+
 #endif /* __LINUX_SIZES_H__ */

index f47273fde9c6..47bbf69944ec 100644
@@ -7,6 +7,7 @@
 #include <dm.h>
 #include <fdtdec.h>
 #include <linux/libfdt.h>
+#include <linux/sizes.h>
 #include <pci.h>
 #include <asm/io.h>
 #include <asm/system.h>

@@ -45,15 +46,62 @@ const struct mbus_dram_target_info *mvebu_mbus_dram_info(void)
 
 /* DRAM init code ... */
 
+#define MV_SIP_DRAM_SIZE	0x82000010
+
+static u64 a8k_dram_scan_ap_sz(void)
+{
+	struct pt_regs pregs;
+
+	pregs.regs[0] = MV_SIP_DRAM_SIZE;
+	pregs.regs[1] = SOC_REGS_PHY_BASE;
+	smc_call(&pregs);
+
+	return pregs.regs[0];
+}
+
+static void a8k_dram_init_banksize(void)
+{
+	/*
+	 * The firmware (ATF) leaves a 1G whole above the 3G mark for IO
+	 * devices. Higher RAM is mapped at 4G.
+	 *
+	 * Config 2 DRAM banks:
+	 * Bank 0 - max size 4G - 1G
+	 * Bank 1 - ram size - 4G + 1G
+	 */
+	phys_size_t max_bank0_size = SZ_4G - SZ_1G;
+
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	if (gd->ram_size <= max_bank0_size) {
+		gd->bd->bi_dram[0].size = gd->ram_size;
+		return;
+	}
+
+	gd->bd->bi_dram[0].size = max_bank0_size;
+	if (CONFIG_NR_DRAM_BANKS > 1) {
+		gd->bd->bi_dram[1].start = SZ_4G;
+		gd->bd->bi_dram[1].size = gd->ram_size - max_bank0_size;
+	}
+}
+
 int dram_init_banksize(void)
 {
-	fdtdec_setup_memory_banksize();
+	if (CONFIG_IS_ENABLED(ARMADA_8K))
+		a8k_dram_init_banksize();
+	else
+		fdtdec_setup_memory_banksize();
 
 	return 0;
 }
 
 int dram_init(void)
 {
+	if (CONFIG_IS_ENABLED(ARMADA_8K)) {
+		gd->ram_size = a8k_dram_scan_ap_sz();
+		if (gd->ram_size != 0)
+			return 0;
+	}
+
 	if (fdtdec_setup_mem_size_base() != 0)
 		return -EINVAL;