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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/unicore32/include/mach/memory.h
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*/
#ifndef __MACH_PUV3_MEMORY_H__
#define __MACH_PUV3_MEMORY_H__
#include <mach/hardware.h>
/* Physical DRAM offset. */
#define PHYS_OFFSET UL(0x00000000)
/* The base address of exception vectors. */
#define VECTORS_BASE UL(0xffff0000)
/* The base address of kuser area. */
#define KUSER_BASE UL(0x80000000)
#ifdef __ASSEMBLY__
/* The byte offset of the kernel image in RAM from the start of RAM. */
#define KERNEL_IMAGE_START 0x00408000
#endif
#if !defined(__ASSEMBLY__) && defined(CONFIG_PCI)
void puv3_pci_adjust_zones(unsigned long *max_zone_pfn);
#define arch_adjust_zones(max_zone_pfn) \
puv3_pci_adjust_zones(max_zone_pfn)
#endif
/*
* PCI controller in PKUnity-3 masks highest 5-bit for upstream channel,
* so we must limit the DMA allocation within 128M physical memory for
* supporting PCI devices.
*/
#define PCI_DMA_THRESHOLD (PHYS_OFFSET + SZ_128M - 1)
#define is_pcibus_device(dev) (dev && \
(strncmp(dev->bus->name, "pci", 3) == 0))
#define __virt_to_pcibus(x) (__virt_to_phys((x) + PKUNITY_PCIAHB_BASE))
#define __pcibus_to_virt(x) (__phys_to_virt(x) - PKUNITY_PCIAHB_BASE)
/* kuser area */
#define KUSER_VECPAGE_BASE (KUSER_BASE + UL(0x3fff0000))
/* kuser_vecpage (0xbfff0000) is ro, and vectors page (0xffff0000) is rw */
#define kuser_vecpage_to_vectors(x) ((x) - (KUSER_VECPAGE_BASE) \
+ (VECTORS_BASE))
#endif
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