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25 Feb 2020 17:03:16 -0800 IronPort-SDR: uYo8/yrdVKwUzqReGdMdTrQ3dSJmyKvsNgCAiPHd8mBJG5pa8Xkamt42xv+OK0H1Ikp3xGDQsF ftEMYmliGZhro6eqMNQ0uZ1bBq+V5Q3ZnweFEcLHkJYZcjBTj0ZQVSQjLVwhjT/+Cwt7EUky2o SagAFlELftAlMUBYjHpNT5CLhV3eejODZHig/Qt7cIcL4hGTTxcbxzekGU22nJPWuWNIZgzKB2 qhpSaRB6WDIZmTAI0d1zashabLhrnFRJvbfJdAHIQPvWJHVSyPwsz+lpBxLknNeXurWJDtbWfF OZY= WDCIronportException: Internal Received: from jedi-01.sdcorp.global.sandisk.com (HELO jedi-01.int.fusionio.com) ([10.11.143.218]) by uls-op-cesaip02.wdc.com with ESMTP; 25 Feb 2020 17:10:48 -0800 From: Atish Patra To: linux-kernel@vger.kernel.org Subject: [RFC PATCH 3/5] RISC-V: Define fixmap bindings for generic early ioremap support Date: Tue, 25 Feb 2020 17:10:35 -0800 Message-Id: <20200226011037.7179-4-atish.patra@wdc.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200226011037.7179-1-atish.patra@wdc.com> References: <20200226011037.7179-1-atish.patra@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200225_171101_465478_3DE3F993 X-CRM114-Status: GOOD ( 14.39 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kate Stewart , linux-efi@vger.kernel.org, Ard Biesheuvel , Catalin Marinas , Linus Walleij , Russell King , Atish Patra , Mauro Carvalho Chehab , linux-riscv@lists.infradead.org, Will Deacon , Ingo Molnar , "Chang, Abner \(HPS SW/FW Technologist\)" , Michal Simek , Mike Rapoport , Greentime Hu , Borislav Petkov , Mao Han , daniel.schaefer@hpe.com, Albert Ou , Kees Cook , Arnd Bergmann , Alexios Zavras , Alexander Graf , Paul Walmsley , Thomas Gleixner , Allison Randal , "leif@nuviainc.com" , Greg Kroah-Hartman , Anup Patel , Palmer Dabbelt , Paolo Bonzini , Andrew Morton Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org UEFI uses early IO or memory mappings for runtime services before normal ioremap() is usable. This patch only adds minimum necessary fixmap bindings and headers for generic ioremap support to work. Signed-off-by: Atish Patra --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/Kbuild | 1 + arch/riscv/include/asm/fixmap.h | 21 ++++++++++++++++++++- arch/riscv/include/asm/io.h | 1 + 4 files changed, 23 insertions(+), 1 deletion(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 27bfc7947e44..42c122170cfd 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -65,6 +65,7 @@ config RISCV select ARCH_HAS_GCOV_PROFILE_ALL select HAVE_COPY_THREAD_TLS select HAVE_ARCH_KASAN if MMU && 64BIT + select GENERIC_EARLY_IOREMAP config ARCH_MMAP_RND_BITS_MIN default 18 if 64BIT diff --git a/arch/riscv/include/asm/Kbuild b/arch/riscv/include/asm/Kbuild index ec0ca8c6ab64..517394390106 100644 --- a/arch/riscv/include/asm/Kbuild +++ b/arch/riscv/include/asm/Kbuild @@ -4,6 +4,7 @@ generic-y += checksum.h generic-y += compat.h generic-y += device.h generic-y += div64.h +generic-y += early_ioremap.h generic-y += extable.h generic-y += flat.h generic-y += dma.h diff --git a/arch/riscv/include/asm/fixmap.h b/arch/riscv/include/asm/fixmap.h index 42d2c42f3cc9..7a4beb7e29a3 100644 --- a/arch/riscv/include/asm/fixmap.h +++ b/arch/riscv/include/asm/fixmap.h @@ -25,9 +25,28 @@ enum fixed_addresses { #define FIX_FDT_SIZE SZ_1M FIX_FDT_END, FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1, + FIX_EARLYCON_MEM_BASE, + FIX_PTE, FIX_PMD, - FIX_EARLYCON_MEM_BASE, + /* + * Make sure that it is 2MB aligned. + */ +#define NR_FIX_SZ_2M (SZ_2M / PAGE_SIZE) + FIX_THOLE = NR_FIX_SZ_2M - FIX_PMD - 1, + + __end_of_permanent_fixed_addresses, + /* + * Temporary boot-time mappings, used by early_ioremap(), + * before ioremap() is functional. + */ +#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE) +#define FIX_BTMAPS_SLOTS 7 +#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS) + + FIX_BTMAP_END = __end_of_permanent_fixed_addresses, + FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, + __end_of_fixed_addresses }; diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h index 0f477206a4ed..047f414b6948 100644 --- a/arch/riscv/include/asm/io.h +++ b/arch/riscv/include/asm/io.h @@ -14,6 +14,7 @@ #include #include #include +#include /* * MMIO access functions are separated out to break dependency cycles -- 2.24.0