| Date | Thu, 15 Jan 2015 12:45:03 -0600 | From | Mark Langsdorf <> | Subject | Re: [PATCH v7 02/17] ARM64 / ACPI: Get RSDP and ACPI boot-time tables |
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On 01/14/2015 09:04 AM, Hanjun Guo wrote: > From: Al Stone <al.stone@linaro.org> > > As we want to get ACPI tables to parse and then use the information > for system initialization, we should get the RSDP (Root System > Description Pointer) first, it then locates Extended Root Description > Table (XSDT) which contains all the 64-bit physical address that > pointer to other boot-time tables. > > Introduce acpi.c and its related head file in this patch to provide > fundamental needs of extern variables and functions for ACPI core, > and then get boot-time tables as needed. > - asm/acenv.h for arch specific ACPICA environments and > implementation, It is needed unconditionally by ACPI core; > - asm/acpi.h for arch specific variables and functions needed by > ACPI driver core; > - acpi.c for ARM64 related ACPI implementation for ACPI driver > core; > > acpi_boot_table_init() is introduced to get RSDP and boot-time tables, > it will be called in setup_arch() before paging_init(), so we should > use eary_memremap() mechanism here to get the RSDP and all the table > pointers. > > Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> > Tested-by: Yijing Wang <wangyijing@huawei.com> > Signed-off-by: Al Stone <al.stone@linaro.org> > Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org> > Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org> > Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> > --- Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
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