From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755051AbdKHG0n (ORCPT ); Wed, 8 Nov 2017 01:26:43 -0500 Received: from mail-pf0-f195.google.com ([209.85.192.195]:45127 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754063AbdKHGU3 (ORCPT ); Wed, 8 Nov 2017 01:20:29 -0500 X-Google-Smtp-Source: ABhQp+QoLCUv9qkuEDvIDh66cmk4ZQreJp8fOkbbBW1NuU4esl4+yFIzaua5cG0OkfV1e6ABoCEPXA== From: Greentime Hu To: greentime@andestech.com, linux-kernel@vger.kernel.org, arnd@arndb.de, linux-arch@vger.kernel.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, robh+dt@kernel.org, netdev@vger.kernel.org Cc: green.hu@gmail.com, Vincent Chen Subject: [PATCH 12/31] nds32: Device specific operations Date: Wed, 8 Nov 2017 13:55:00 +0800 Message-Id: <4e9acf2ec55fb26ddb290ca2d955eeea628e0a77.1510118606.git.green.hu@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greentime Hu Signed-off-by: Vincent Chen Signed-off-by: Greentime Hu --- arch/nds32/include/asm/io.h | 33 +++++++++++++++++++++ arch/nds32/mm/ioremap.c | 67 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 100 insertions(+) create mode 100644 arch/nds32/include/asm/io.h create mode 100644 arch/nds32/mm/ioremap.c diff --git a/arch/nds32/include/asm/io.h b/arch/nds32/include/asm/io.h new file mode 100644 index 0000000..98b3ae9 --- /dev/null +++ b/arch/nds32/include/asm/io.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2005-2017 Andes Technology Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef __ASM_NDS32_IO_H +#define __ASM_NDS32_IO_H + +#ifdef __KERNEL__ + +#include +extern void __iomem *__ioremap(unsigned long, size_t, unsigned long, + unsigned long); +extern void __iounmap(void __iomem * addr); + +#define ioremap(cookie,size) __ioremap(cookie,size,0,1) +#define ioremap_nocache(cookie,size) __ioremap(cookie,size,0,1) +#define iounmap(cookie) __iounmap(cookie) +#include + +#endif /* __KERNEL__ */ +#endif /* __ASM_NDS32_IO_H */ diff --git a/arch/nds32/mm/ioremap.c b/arch/nds32/mm/ioremap.c new file mode 100644 index 0000000..532e6cf --- /dev/null +++ b/arch/nds32/mm/ioremap.c @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2005-2017 Andes Technology Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include + +void __iomem *__ioremap(unsigned long phys_addr, size_t size, + unsigned long flags, unsigned long align) +{ + struct vm_struct *area; + unsigned long addr, offset, last_addr; + pgprot_t prot; + + /* Don't allow wraparound or zero size */ + last_addr = phys_addr + size - 1; + if (!size || last_addr < phys_addr) + return NULL; + + /* + * Mappings have to be page-aligned + */ + offset = phys_addr & ~PAGE_MASK; + phys_addr &= PAGE_MASK; + size = PAGE_ALIGN(last_addr + 1) - phys_addr; + + /* + * Ok, go for it.. + */ + area = get_vm_area(size, VM_IOREMAP); + if (!area) + return NULL; + + area->phys_addr = phys_addr; + addr = (unsigned long)area->addr; + prot = __pgprot(_PAGE_V | _PAGE_M_KRW | _PAGE_D | + _PAGE_G | _PAGE_C_DEV); + if (ioremap_page_range(addr, addr + size, phys_addr, prot)) { + vunmap((void *)addr); + return NULL; + } + return (__force void __iomem *)(offset + (char *)addr); + +} + +EXPORT_SYMBOL(__ioremap); + +void __iounmap(void __iomem * addr) +{ + vunmap((void *)(PAGE_MASK & (unsigned long)addr)); +} + +EXPORT_SYMBOL(__iounmap); -- 1.7.9.5