ping. On Sat, Aug 22, 2020 at 10:15 PM Niteesh G. S. <niteesh...@gmail.com> wrote:
> Hello, > > I went through the history of the OF implementation in NetBSD and FreeBSD. > I have summarized the things I have found out below. > > The first OF implementation seems to come from NetBSD this is actually > BSD-4 > licensed. FreeBSD and also other BSD have used this as the base and > improved > the API. For eg functions like OF_getprop_allloc_multi, OF_getencprop were > not > present in the original OF interface but were added by FreeBSD. And also > NetBSD > doesn't use KOBJS for function dispatch but rather uses platform-specific > OF > implementation, that is FDT implementation is present under > sys/dev/fdt/fdt_openfirm.c > powerPC implementation under arch/powerpc/openfirm.c. > NetBSD openfirm.h: > https://github.com/NetBSD/src/blob/trunk/sys/dev/ofw/openfirm.h > And I think was adding the OF interface FreeBSD has added the BSD-2 > license. > > > https://github.com/freebsd/freebsd/commit/d84d862cbd66f3f9ab4ce65fe69893664689c73b > This is the commit where they have added OF interface to FreeBSD and from > the > commit it seems like they have added the BSD-2 license with the interface > itself. > And the functions where we worry about the similarity are all FreeBSD > extension > so I guess we won't have any issue since they would come under BSD-2 > license. > > > Thanks, > Niteesh. > > On Sat, Aug 22, 2020 at 7:23 PM Gedare Bloom <ged...@rtems.org> wrote: > >> On Fri, Aug 21, 2020 at 11:26 AM Niteesh G. S. <niteesh...@gmail.com> >> wrote: >> > >> > >> > >> > On Fri, Aug 21, 2020 at 9:38 PM Gedare Bloom <ged...@rtems.org> wrote: >> >> >> >> Hi Niteesh, >> >> >> >> Can you explain how you developed the new code in a way that ensures >> >> that we do not have any of the previously 4-BSD licensed code left? >> > >> > The FDT implementation of the OF interface present is ofw_fdt.c is, >> fortunately, >> > BSD-2 licensed so I was able to copy/reuse most of it for RTEMS ofw.c >> > >> > The interface(openfirm.h) and the implementation(opefirm.c) that calls >> the >> > respective KOBJs functions are BSD-4 licensed. Since it was mentioned >> that >> > copying the interface is fine I don't think there is an issue with it. >> The OF >> > interface in RTEMS is present in ofw_compat.h >> > >> > I also want to make note of one thing, there are few functions in ofw.c >> > which look exactly the same as the ones present in openfirm.c can you >> > please make sure that these functions won't cause any issues. >> > Few examples are, rtems_ofw_get_enc_prop_alloc, >> rtems_ofw_get_enc_prop_alloc_multi. >> > >> The similarity in these functions is problematic. >> >> I still think it would be worth the trouble to try to dig through the >> history to find exactly what code was introduced with the 4-bsd. I >> would guess that came out of netbsd. >> >> > Thanks, >> > Niteesh. >> > >> >> >> >> Gedare >> >> >> >> On Thu, Aug 20, 2020 at 1:52 AM G S Niteesh Babu <niteesh...@gmail.com> >> wrote: >> >> > >> >> > RTEMS OFW is a FDT only implementation of the OpenFirmWare >> >> > interface. This API is created to be compatible with FreeBSD >> >> > OpenFirmWare interface. The main intention is to make >> >> > porting of FreeBSD drivers to RTEMS easier. >> >> > >> >> > Most functions implemented have an direct one-one mapping >> >> > with the original OFW API and some extra auxiliary functions >> >> > were implemented to make working with device trees easier in >> >> > RTEMS. >> >> > >> >> > Update #3784 >> >> > --- >> >> > bsps/include/ofw/ofw.h | 548 +++++++++++++++++++++++++++ >> >> > bsps/include/ofw/ofw_compat.h | 74 ++++ >> >> > bsps/shared/ofw/ofw.c | 670 >> ++++++++++++++++++++++++++++++++++ >> >> > spec/build/bsps/obj.yml | 4 + >> >> > 4 files changed, 1296 insertions(+) >> >> > create mode 100644 bsps/include/ofw/ofw.h >> >> > create mode 100644 bsps/include/ofw/ofw_compat.h >> >> > create mode 100644 bsps/shared/ofw/ofw.c >> >> > >> >> > diff --git a/bsps/include/ofw/ofw.h b/bsps/include/ofw/ofw.h >> >> > new file mode 100644 >> >> > index 0000000000..50f64ff695 >> >> > --- /dev/null >> >> > +++ b/bsps/include/ofw/ofw.h >> >> > @@ -0,0 +1,548 @@ >> >> > +/* SPDX-License-Identifier: BSD-2-Clause */ >> >> > + >> >> > +/** >> >> > + * @file >> >> > + * >> >> > + * @ingroup ofw >> >> > + * >> >> > + * RTEMS FDT implementation of OpenFirmWare Interface. >> >> > + * >> >> > + * RTEMS OFW is a FDT only implementation of the OpenFirmWare >> interface. >> >> > + * This API is created to be compatible with FreeBSD OpenFirmWare >> interface. >> >> > + * The main intention is to make porting of FreeBSD drivers to >> RTEMS easier. >> >> > + */ >> >> > + >> >> > +/* >> >> > + * Copyright (C) 2020 Niteesh Babu G S <niteesh...@gmail.com> >> >> > + * >> >> > + * Redistribution and use in source and binary forms, with or >> without >> >> > + * modification, are permitted provided that the following >> conditions >> >> > + * are met: >> >> > + * 1. Redistributions of source code must retain the above copyright >> >> > + * notice, this list of conditions and the following disclaimer. >> >> > + * 2. Redistributions in binary form must reproduce the above >> copyright >> >> > + * notice, this list of conditions and the following disclaimer >> in the >> >> > + * documentation and/or other materials provided with the >> distribution. >> >> > + * >> >> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND >> CONTRIBUTORS "AS IS" >> >> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT >> LIMITED TO, THE >> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A >> PARTICULAR PURPOSE >> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR >> CONTRIBUTORS BE >> >> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, >> OR >> >> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, >> PROCUREMENT OF >> >> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR >> BUSINESS >> >> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, >> WHETHER IN >> >> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR >> OTHERWISE) >> >> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF >> ADVISED OF THE >> >> > + * POSSIBILITY OF SUCH DAMAGE. >> >> > + */ >> >> > + >> >> > +#ifndef _OFW_H >> >> > +#define _OFW_H >> >> > + >> >> > +#ifdef __cplusplus >> >> > +extern "C" { >> >> > +#endif >> >> > + >> >> > +#include <rtems.h> >> >> > +#include <stdint.h> >> >> > +#include <stddef.h> >> >> > + >> >> > +/** >> >> > + * Represents a node in the device tree. The offset from fdtp to >> node is used >> >> > + * instead of fdt offset to make sure this is compatible with OF >> interface in >> >> > + * FreeBSD. >> >> > + */ >> >> > +typedef uint32_t phandle_t; >> >> > +/** >> >> > + * Represents the effective phandle of the node. >> >> > + */ >> >> > +typedef uint32_t ihandle_t; >> >> > +/** >> >> > + * Represents the data type of the buffer. >> >> > + */ >> >> > +typedef uint32_t pcell_t; >> >> > + >> >> > +/** >> >> > + * @struct rtems_ofw_memory_area >> >> > + * >> >> > + * This is used to represent elements(FDT properties) that define >> >> > + * region of memory address. >> >> > + */ >> >> > +typedef struct { >> >> > + /** The start address of the memory region. */ >> >> > + uint32_t start; >> >> > + /** The size of the memory region. */ >> >> > + uint32_t size; >> >> > +} rtems_ofw_memory_area; >> >> > + >> >> > +/** >> >> > + * @struct rtems_ofw_ranges >> >> > + * >> >> > + * This is used to represent the ranges property in the device tree. >> >> > + */ >> >> > +typedef struct { >> >> > + /** The physical address within the child bus address space */ >> >> > + uint32_t child_bus; >> >> > + /** The physical address within the parent bus address space */ >> >> > + uint32_t parent_bus; >> >> > + /** The size of the range in the child’s address space */ >> >> > + uint32_t size; >> >> > +} rtems_ofw_ranges; >> >> > + >> >> > +/** >> >> > + * @brief Gets the node that is next to @a node. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * >> >> > + * @retval Peer node offset Successful operation. >> >> > + * @retval 0 No peer node or invalid node handle >> >> > + */ >> >> > +phandle_t rtems_ofw_peer( >> >> > + phandle_t node >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the node that is the child of @a node. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * >> >> > + * @retval child node offset Successful operation. >> >> > + * @retval 0 No child node or invalid node handle >> >> > + */ >> >> > +phandle_t rtems_ofw_child( >> >> > + phandle_t node >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the node that is the parent of @a node. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * >> >> > + * @retval child node offset Successful operation. >> >> > + * @retval 0 No child node or invalid node handle >> >> > + */ >> >> > +phandle_t rtems_ofw_parent( >> >> > + phandle_t node >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the length of the property mentioned in @a propname. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] prop Property name >> >> > + * >> >> > + * @retval -1 Invalid node or property >> >> > + * @retval Length of property on successful operation >> >> > + */ >> >> > +size_t rtems_ofw_get_prop_len( >> >> > + phandle_t node, >> >> > + const char *propname >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the value of property mentioned in @a propname. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] prop Property name >> >> > + * @param[out] buf The property value gets stored in this buffer >> (Pre-allocated) >> >> > + * @param[in] len Length of the buffer >> >> > + >> >> > + * @retval -1 Invalid node or property >> >> > + * @retval Length of property on successful operation >> >> > + */ >> >> > +size_t rtems_ofw_get_prop( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the value of property mentioned in @a prop. >> >> > + * >> >> > + * Gets the value of property of @a node and converts the value >> into the host's >> >> > + * endianness. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] prop Property name >> >> > + * @param[out] buf The property value gets stored in this >> buffer(Pre-allocated) >> >> > + * after converted to the host's endianness >> >> > + * @param[in] len Length of the buffer >> >> > + * >> >> > + * @retval -1 Invalid node or property >> >> > + * @retval Length of property on successful operation >> >> > + */ >> >> > +size_t rtems_ofw_get_enc_prop( >> >> > + phandle_t node, >> >> > + const char *prop, >> >> > + pcell_t *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Checks if the property @a propname is present in @a node. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * >> >> > + * @retval 0 Property not present. >> >> > + * @retval 1 Property is present. >> >> > + */ >> >> > +int rtems_ofw_has_prop( >> >> > + phandle_t node, >> >> > + const char *propname >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Searches for property @a propname in @a node. >> >> > + * >> >> > + * Searches the node and its parent recursively for the property >> and fills the >> >> > + * buffer with the first found value. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * @param[out] buf The property value gets stored in this buffer >> (Pre-allocated) >> >> > + * @param[in] len Length of the buffer >> >> > + * >> >> > + * @retval Length of the property if property is found. >> >> > + * @retval -1 Property is not found. >> >> > + */ >> >> > +size_t rtems_ofw_search_prop( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Searches for property @a propname in @a node. >> >> > + * >> >> > + * Searches the node and its parent recursively for the property >> and fills the >> >> > + * buffer with the first value found after converting it to the >> endianness of >> >> > + * the host. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * @param[out] buf The property value gets stored in this >> buffer(Pre-allocated) >> >> > + * after converted to the host's endianness >> >> > + * @param[in] len Length of the buffer >> >> > + * >> >> > + * @retval Length of the property if property is found. >> >> > + * @retval -1 Property is not found. >> >> > + */ >> >> > +size_t rtems_ofw_search_enc_prop( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + pcell_t *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the value of property mentioned in @a propname. >> >> > + * >> >> > + * Same as rtems_ofw_getprop, but the @a buf is allocated in this >> routine and >> >> > + * the user is responsible for freeing it. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * @param[out] buf The buffer is allocated in this routine and user >> is >> >> > + * responsible for freeing. >> >> > + * >> >> > + * @retval -1 Property is not found. >> >> > + * @retval Length of the property if property is found. >> >> > + */ >> >> > +size_t rtems_ofw_get_prop_alloc( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void **buf >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets multiple values of the property @a propname. >> >> > + * >> >> > + * Same as rtems_ofw_getprop_alloc but it can read properties with >> multiple >> >> > + * values. >> >> > + * For eg: reg = <0x1000 0x10 0x2000 0x20> >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * @param[in] elsz Size of the single value >> >> > + * @param[out] buf The buffer is allocated in this routine and user >> is >> >> > + * responsible for freeing. >> >> > + * >> >> > + * @retval -1 Property is not found. >> >> > + * @retval Number of values read. >> >> > + */ >> >> > +size_t rtems_ofw_get_prop_alloc_multi( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + int elsz, >> >> > + void **buf >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets the value of property mentioned in @a propname. >> >> > + * >> >> > + * Same as rtems_ofw_getprop_alloc but the value stored in the >> buffer is >> >> > + * converted into the host's endianness. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * @param[out] buf The buffer is allocated in this routine and user >> is >> >> > + * responsible for freeing. >> >> > + * >> >> > + * @retval -1 Property is not found. >> >> > + * @retval Length of the property if property is found. >> >> > + */ >> >> > +size_t rtems_ofw_get_enc_prop_alloc( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void **buf >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Gets multiple values of the property @a propname. >> >> > + * >> >> > + * Same as rtems_ofw_getprop_alloc_multi but the values stored in >> the buffer >> >> > + * are converted to the host's endianness. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] propname Property name >> >> > + * @param[in] elsz Size of the single value >> >> > + * @param[out] buf The buffer is allocated in this routine and user >> is >> >> > + * responsible for freeing. >> >> > + * >> >> > + * @retval -1 Property is not found. >> >> > + * @retval Number of values read. >> >> > + */ >> >> > +size_t rtems_ofw_get_enc_prop_alloc_multi( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + int elsz, >> >> > + void **buf >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Free's the buffers allocated by the rtems_ofw_*_alloc >> functions. >> >> > + * >> >> > + * @param[in] buf Buffer to be freed >> >> > + */ >> >> > +void rtems_ofw_free( >> >> > + void *buf >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Finds the next property of @a node. >> >> > + * >> >> > + * Finds the next property of the node and when @a propname is NULL >> it returns >> >> > + * the value in the first property. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] previous Previous property name >> >> > + * @param[out] buf The value of the next property gets stored in >> this buffer >> >> > + * (Pre-allocated) >> >> > + * @param[in] len Length of the buffer >> >> > + * >> >> > + * @retval -1 node or previous property does not exist >> >> > + * @retval 0 no more properties >> >> > + * @retval 1 success >> >> > + */ >> >> > +int rtems_ofw_next_prop( >> >> > + phandle_t node, >> >> > + const char *previous, >> >> > + char *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Sets the property @name of @a node to @a buf. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[in] name Property name >> >> > + * @param[in] buf Buffer contains the value to be set. >> >> > + * @param[in] len Length of the buffer >> >> > + * >> >> > + * @retval -1 node does not exist >> >> > + * @retval 0 on success >> >> > + * @retval libFDT error codes on unsuccessful setting operation >> >> > + */ >> >> > +int rtems_ofw_set_prop( >> >> > + phandle_t node, >> >> > + const char *name, >> >> > + const void *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Converts a device specifier to a fully qualified path >> name. >> >> > + * >> >> > + * @param[in] dev device specifier >> >> > + * @param[out] buf The path is filled into the buffer(Pre-allocated) >> >> > + * @param[in] length of the buffer >> >> > + * >> >> > + * @retval -1 always. Unimplemented. >> >> > + */ >> >> > +size_t rtems_ofw_canon( >> >> > + const char *dev, >> >> > + char *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Finds the node at the given path >> >> > + * >> >> > + * @param[in] path to the node from root >> >> > + * >> >> > + * @retval -1 node does not exist >> >> > + * @retval node handle on success >> >> > + */ >> >> > +phandle_t rtems_ofw_find_device( >> >> > + const char *path >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief This routine converts effective phandle @a xref to node >> offset. >> >> > + * >> >> > + * @param[in] xref Node phandle >> >> > + * >> >> > + * @retval Node offset on success >> >> > + * @retval Node phandle on failure >> >> > + */ >> >> > +phandle_t rtems_ofw_node_from_xref( >> >> > + phandle_t xref >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief This routine converts node offset to effective phandle of >> @a node. >> >> > + * >> >> > + * @retval Node phandle on success >> >> > + * @retval Node offset on failure >> >> > + */ >> >> > +phandle_t rtems_ofw_xref_from_node( >> >> > + phandle_t node >> >> > +); >> >> > + >> >> > +/* >> >> > + * instance handles(ihandle_t) as same as phandles in the FDT >> implementation >> >> > + * of OF interface. >> >> > + */ >> >> > + >> >> > +/** >> >> > + * @brief Converts @a instance handle to phandle. >> >> > + * >> >> > + * instance are same as node offsets in FDT. >> >> > + * >> >> > + * @param[in] instance Node offset >> >> > + * >> >> > + * @retval phandle of node on success. >> >> > + * @retval instance of node on failure. >> >> > + */ >> >> > +phandle_t rtems_ofw_instance_to_package( >> >> > + ihandle_t instance >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Find the node's path from phandle. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[out] buf Path is filled into this buffer(Pre-allocated). >> >> > + * @param[in] len Length of the buffer. >> >> > + * >> >> > + * @retval -1 always. Unimplemented. >> >> > + */ >> >> > +size_t rtems_ofw_package_to_path( >> >> > + phandle_t node, >> >> > + char *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Find the node's path from ihandle. >> >> > + * >> >> > + * @param[in] instance Node offset >> >> > + * @param[out] buf Path is filled into this buffer(Pre-allocated). >> >> > + * @param[in] len Length of the buffer. >> >> > + * >> >> > + * @retval -1 always. Unimplemented. >> >> > + */ >> >> > +size_t rtems_ofw_instance_to_path( >> >> > + ihandle_t instance, >> >> > + char *buf, >> >> > + size_t len >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Queries the node's reg value. >> >> > + * >> >> > + * This routine fills the buffer @a buf with the values in reg >> property of node >> >> > + * @a node. It reads all the values of the property and fills the >> buffer to max >> >> > + * size. >> >> > + * This routine is local to RTEMS OFW and does not have an >> corresponding >> >> > + * FreeBSD OFW pair. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[out] buf Register values are stored in this >> buffer(Pre-allocated). >> >> > + * @param[in] size Length of the buffer. >> >> > + * >> >> > + * @retval -1 If reg property is missing. >> >> > + * @retval Length of the reg property in bytes. >> >> > + */ >> >> > +int rtems_ofw_get_reg( >> >> > + phandle_t node, >> >> > + rtems_ofw_memory_area *buf, >> >> > + size_t size >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Queries the node's interrupt value. >> >> > + * >> >> > + * This routine fills the buffer @a buf with the interrupt number. >> In case of >> >> > + * multiple numbers it fills the buffer to its full extent. >> >> > + * This routine is local to RTEMS OFW and does not have an >> corresponding >> >> > + * FreeBSD OFW pair. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * @param[out] buf Interrupt values are stored in this >> buffer(Pre-allocated). >> >> > + * @param[in] size Length of the buffer. >> >> > + * >> >> > + * @retval -1 If interrupts property is missing. >> >> > + * @retval The number of interrupt numbers read. >> >> > + */ >> >> > +int rtems_ofw_get_interrupts( >> >> > + phandle_t node, >> >> > + rtems_vector_number *buf, >> >> > + size_t size >> >> > +); >> >> > + >> >> > +/** >> >> > + * @brief Queries the node's status. >> >> > + * >> >> > + * This routine is local to RTEMS OFW and does not have an >> corresponding >> >> > + * FreeBSD OFW pair. >> >> > + * >> >> > + * @param[in] node Node offset >> >> > + * >> >> > + * @retval true Status is OK or empty. >> >> > + * @retval false Status is not OK or missing. >> >> > + */ >> >> > +bool rtems_ofw_node_status( phandle_t node ); >> >> > + >> >> > +/** >> >> > + * @brief Gets node phandle from compatible property. >> >> > + * >> >> > + * This routine is local to RTEMS OFW and does not have an >> corresponding >> >> > + * FreeBSD OFW pair. >> >> > + * >> >> > + * @param[in] compat Compatible string >> >> > + * >> >> > + * @retval 0 Node with @a compat as compatible string not found >> >> > + * @retval Node phandle on success. >> >> > + */ >> >> > +phandle_t rtems_ofw_find_device_by_compat( const char *compat ); >> >> > + >> >> > +#ifdef __cplusplus >> >> > +} >> >> > +#endif >> >> > + >> >> > +#endif /* _OFW_H */ >> >> > diff --git a/bsps/include/ofw/ofw_compat.h >> b/bsps/include/ofw/ofw_compat.h >> >> > new file mode 100644 >> >> > index 0000000000..be4a5ea3ce >> >> > --- /dev/null >> >> > +++ b/bsps/include/ofw/ofw_compat.h >> >> > @@ -0,0 +1,74 @@ >> >> > +/* SPDX-License-Identifier: BSD-2-Clause */ >> >> > + >> >> > +/** >> >> > + * @file >> >> > + * >> >> > + * @ingroup ofw >> >> > + * >> >> > + * This file defines necessary symbols to make the RTEMS OFW API >> compatible >> >> > + * with FreeBSD OFW. >> >> > + */ >> >> > + >> >> > +/* >> >> > + * Copyright (C) 2020 Niteesh Babu G S <niteesh...@gmail.com> >> >> > + * >> >> > + * Redistribution and use in source and binary forms, with or >> without >> >> > + * modification, are permitted provided that the following >> conditions >> >> > + * are met: >> >> > + * 1. Redistributions of source code must retain the above copyright >> >> > + * notice, this list of conditions and the following disclaimer. >> >> > + * 2. Redistributions in binary form must reproduce the above >> copyright >> >> > + * notice, this list of conditions and the following disclaimer >> in the >> >> > + * documentation and/or other materials provided with the >> distribution. >> >> > + * >> >> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND >> CONTRIBUTORS "AS IS" >> >> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT >> LIMITED TO, THE >> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A >> PARTICULAR PURPOSE >> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR >> CONTRIBUTORS BE >> >> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, >> OR >> >> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, >> PROCUREMENT OF >> >> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR >> BUSINESS >> >> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, >> WHETHER IN >> >> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR >> OTHERWISE) >> >> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF >> ADVISED OF THE >> >> > + * POSSIBILITY OF SUCH DAMAGE. >> >> > + */ >> >> > + >> >> > +#ifndef _OFW_COMPAT_H >> >> > +#define _OFW_COMPAT_H >> >> > + >> >> > +#ifdef __cplusplus >> >> > +extern "C" { >> >> > +#endif >> >> > + >> >> > +#include <ofw/ofw.h> >> >> > + >> >> > +#define OF_peer rtems_ofw_peer >> >> > +#define OF_child rtems_ofw_child >> >> > +#define OF_parent rtems_ofw_parent >> >> > +#define OF_getproplen rtems_ofw_get_prop_len >> >> > +#define OF_getprop rtems_ofw_get_prop >> >> > +#define OF_getencprop rtems_ofw_get_enc_prop >> >> > +#define OF_hasprop rtems_ofw_has_prop >> >> > +#define OF_searchprop rtems_ofw_search_prop >> >> > +#define OF_searchencprop rtems_ofw_search_enc_prop >> >> > +#define OF_getprop_alloc rtems_ofw_get_prop_alloc >> >> > +#define OF_getprop_alloc_multi rtems_ofw_get_prop_alloc_multi >> >> > +#define OF_getencprop_alloc_multi rtems_ofw_get_enc_prop_alloc_multi >> >> > +#define OF_getencprop_alloc rtems_ofw_get_enc_prop_alloc >> >> > +#define OF_prop_free rtems_ofw_free >> >> > +#define OF_nextprop rtems_ofw_next_prop >> >> > +#define OF_setprop rtems_ofw_set_prop >> >> > +#define OF_canon rtems_ofw_canon >> >> > +#define OF_finddevice rtems_ofw_find_device >> >> > +#define OF_package_to_path rtems_ofw_package_to_path >> >> > +#define OF_node_from_xref rtems_ofw_node_from_xref >> >> > +#define OF_xref_from_node rtems_ofw_xref_from_node >> >> > +#define OF_instance_to_package rtems_ofw_instance_to_package >> >> > +#define OF_instance_to_path rtems_ofw_instance_to_path >> >> > + >> >> > +#ifdef __cplusplus >> >> > +} >> >> > +#endif >> >> > + >> >> > +#endif /* _OFW_COMPAT_H */ >> >> > diff --git a/bsps/shared/ofw/ofw.c b/bsps/shared/ofw/ofw.c >> >> > new file mode 100644 >> >> > index 0000000000..481b29553b >> >> > --- /dev/null >> >> > +++ b/bsps/shared/ofw/ofw.c >> >> > @@ -0,0 +1,670 @@ >> >> > +/* SPDX-License-Identifier: BSD-2-Clause */ >> >> > + >> >> > +/** >> >> > + * @file >> >> > + * >> >> > + * @ingroup ofw >> >> > + */ >> >> > + >> >> > +/* >> >> > + * Copyright (C) 2020 Niteesh Babu G S <niteesh...@gmail.com> >> >> > + * >> >> > + * Redistribution and use in source and binary forms, with or >> without >> >> > + * modification, are permitted provided that the following >> conditions >> >> > + * are met: >> >> > + * 1. Redistributions of source code must retain the above copyright >> >> > + * notice, this list of conditions and the following disclaimer. >> >> > + * 2. Redistributions in binary form must reproduce the above >> copyright >> >> > + * notice, this list of conditions and the following disclaimer >> in the >> >> > + * documentation and/or other materials provided with the >> distribution. >> >> > + * >> >> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND >> CONTRIBUTORS "AS IS" >> >> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT >> LIMITED TO, THE >> >> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A >> PARTICULAR PURPOSE >> >> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR >> CONTRIBUTORS BE >> >> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, >> OR >> >> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, >> PROCUREMENT OF >> >> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR >> BUSINESS >> >> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, >> WHETHER IN >> >> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR >> OTHERWISE) >> >> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF >> ADVISED OF THE >> >> > + * POSSIBILITY OF SUCH DAMAGE. >> >> > + */ >> >> > + >> >> > +#ifdef HAVE_CONFIG_H >> >> > +#include "config.h" >> >> > +#endif >> >> > + >> >> > +#include <bsp/fdt.h> >> >> > +#include <sys/param.h> >> >> > +#include <ofw/ofw.h> >> >> > +#include <libfdt.h> >> >> > +#include <assert.h> >> >> > +#include <rtems/sysinit.h> >> >> > + >> >> > +const void *fdtp = NULL; >> >> > + >> >> > +static phandle_t rtems_fdt_offset_to_phandle( int offset ) >> >> > +{ >> >> > + if (offset < 0) { >> >> > + return 0; >> >> > + } >> >> > + >> >> > + return (phandle_t)offset + fdt_off_dt_struct(fdtp); >> >> > +} >> >> > + >> >> > +static int rtems_fdt_phandle_to_offset( phandle_t handle ) >> >> > +{ >> >> > + int off; >> >> > + int fdt_off; >> >> > + >> >> > + off = (int) handle; >> >> > + fdt_off = fdt_off_dt_struct(fdtp); >> >> > + >> >> > + if (off < fdt_off) { >> >> > + return -1; >> >> > + >> >> > + } >> >> > + >> >> > + return off - fdt_off; >> >> > +} >> >> > + >> >> > +static void rtems_ofw_init( void ) { >> >> > + int rv; >> >> > + const void *fdt; >> >> > + >> >> > + fdt = bsp_fdt_get(); >> >> > + >> >> > + rv = fdt_check_header(fdt); >> >> > + >> >> > + /* >> >> > + * If the FDT is invalid exit through fatal. >> >> > + */ >> >> > + if (rv != 0) { >> >> > + rtems_fatal_error_occurred(RTEMS_NOT_CONFIGURED); >> >> > + } >> >> > + >> >> > + fdtp = fdt; >> >> > +} >> >> > + >> >> > +RTEMS_SYSINIT_ITEM( >> >> > + rtems_ofw_init, >> >> > + RTEMS_SYSINIT_BSP_PRE_DRIVERS, >> >> > + RTEMS_SYSINIT_ORDER_FIRST >> >> > +); >> >> > + >> >> > +phandle_t rtems_ofw_peer( phandle_t node ) >> >> > +{ >> >> > + int offset; >> >> > + >> >> > + if (node == 0) { >> >> > + int root = fdt_path_offset(fdtp, "/"); >> >> > + return rtems_fdt_offset_to_phandle(root); >> >> > + } >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + if (offset < 0) { >> >> > + return 0; >> >> > + } >> >> > + >> >> > + offset = fdt_next_subnode(fdtp, offset); >> >> > + return rtems_fdt_offset_to_phandle(offset); >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_child( phandle_t node ) >> >> > +{ >> >> > + int offset; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + if (offset < 0) { >> >> > + return 0; >> >> > + } >> >> > + >> >> > + offset = fdt_first_subnode(fdtp, offset); >> >> > + return rtems_fdt_offset_to_phandle(offset); >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_parent( phandle_t node ) >> >> > +{ >> >> > + int offset; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + if (offset < 0) { >> >> > + return 0; >> >> > + } >> >> > + >> >> > + offset = fdt_parent_offset(fdtp, offset); >> >> > + return rtems_fdt_offset_to_phandle(offset); >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_prop_len( >> >> > + phandle_t node, >> >> > + const char *propname >> >> > +) >> >> > +{ >> >> > + int offset; >> >> > + int len; >> >> > + const void *prop; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + if (offset < 0) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + prop = fdt_getprop(fdtp, offset, propname, &len); >> >> > + >> >> > + if (prop == NULL && strcmp(propname, "name") == 0) { >> >> > + fdt_get_name(fdtp, offset, &len); >> >> > + return len + 1; >> >> > + } >> >> > + >> >> > + if (prop == NULL && strcmp(propname, "/chosen") == 0) { >> >> > + if (strcmp(propname, "fdtbootcpu") == 0) >> >> > + return sizeof(pcell_t); >> >> > + if (strcmp(propname, "fdtmemreserv") == 0) >> >> > + return 2 * sizeof(uint64_t) * fdt_num_mem_rsv(fdtp); >> >> > + } >> >> > + >> >> > + if (prop == NULL) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + return len; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_prop( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void *buf, >> >> > + size_t bufsize >> >> > +) >> >> > +{ >> >> > + const void *prop; >> >> > + int offset; >> >> > + int len; >> >> > + uint32_t cpuid; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + if (offset < 0) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + prop = fdt_getprop(fdtp, offset, propname, &len); >> >> > + >> >> > + if (prop == NULL && strcmp(propname, "name") == 0) { >> >> > + prop = fdt_get_name(fdtp, offset, &len); >> >> > + strncpy(buf, prop, bufsize); >> >> > + return len + 1; >> >> > + } >> >> > + >> >> > + if (prop == NULL && strcmp(propname, "/chosen") == 0) { >> >> > + if (strcmp(propname, "fdtbootcpu") == 0) { >> >> > + cpuid = cpu_to_fdt32(fdt_boot_cpuid_phys(fdtp)); >> >> > + len = sizeof(cpuid); >> >> > + prop = &cpuid; >> >> > + } >> >> > + if (strcmp(propname, "fdtmemreserv") == 0) { >> >> > + prop = (char *)fdtp + fdt_off_mem_rsvmap(fdtp); >> >> > + len = sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp); >> >> > + } >> >> > + } >> >> > + >> >> > + if (prop == NULL) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + bcopy(prop, buf, MIN(len, bufsize)); >> >> > + >> >> > + return len; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_enc_prop( >> >> > + phandle_t node, >> >> > + const char *prop, >> >> > + pcell_t *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + size_t rv; >> >> > + >> >> > + assert(len % 4 == 0); >> >> > + rv = rtems_ofw_get_prop(node, prop, buf, len); >> >> > + >> >> > + if (rv < 0) { >> >> > + return rv; >> >> > + } >> >> > + >> >> > + for (int i = 0; i < (len / 4); i++) { >> >> > + buf[i] = fdt32_to_cpu(buf[i]); >> >> > + } >> >> > + >> >> > + return rv; >> >> > +} >> >> > + >> >> > +int rtems_ofw_has_prop( >> >> > + phandle_t node, >> >> > + const char *propname >> >> > +) >> >> > +{ >> >> > + size_t rv; >> >> > + >> >> > + rv = rtems_ofw_get_prop_len(node, propname); >> >> > + return rv >= 0 ? 1 : 0; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_search_prop( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + size_t rv; >> >> > + >> >> > + for (; node != 0; node = rtems_ofw_parent(node)) { >> >> > + if ((rv = rtems_ofw_get_prop(node, propname, buf, len) != -1)) { >> >> > + return rv; >> >> > + } >> >> > + } >> >> > + >> >> > + return -1; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_search_enc_prop( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + pcell_t *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + size_t rv; >> >> > + >> >> > + for (; node != 0; node = rtems_ofw_parent(node)) { >> >> > + if ((rv = rtems_ofw_get_enc_prop(node, propname, buf, len) != >> -1)) { >> >> > + return rv; >> >> > + } >> >> > + } >> >> > + >> >> > + return -1; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_prop_alloc( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void **buf >> >> > +) >> >> > +{ >> >> > + size_t len; >> >> > + >> >> > + *buf = NULL; >> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + if (len > 0) { >> >> > + *buf = malloc(len); >> >> > + >> >> > + if (rtems_ofw_get_prop(node, propname, *buf, len) == -1) { >> >> > + rtems_ofw_free(buf); >> >> > + *buf = NULL; >> >> > + return -1; >> >> > + } >> >> > + } >> >> > + >> >> > + return len; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_prop_alloc_multi( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + int elsz, >> >> > + void **buf >> >> > +) >> >> > +{ >> >> > + size_t len; >> >> > + >> >> > + *buf = NULL; >> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1 || >> >> > + (len % elsz != 0)) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + if (len > 0) { >> >> > + *buf = malloc(len); >> >> > + >> >> > + if (rtems_ofw_get_prop(node, propname, *buf, len) == -1) { >> >> > + rtems_ofw_free(buf); >> >> > + *buf = NULL; >> >> > + return -1; >> >> > + } >> >> > + } >> >> > + >> >> > + return (len / elsz); >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_enc_prop_alloc( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + void **buf >> >> > +) >> >> > +{ >> >> > + size_t len; >> >> > + >> >> > + *buf = NULL; >> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + if (len > 0) { >> >> > + *buf = malloc(len); >> >> > + >> >> > + if (rtems_ofw_get_enc_prop(node, propname, *buf, len) == -1) { >> >> > + rtems_ofw_free(buf); >> >> > + *buf = NULL; >> >> > + return -1; >> >> > + } >> >> > + } >> >> > + >> >> > + return len; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_get_enc_prop_alloc_multi( >> >> > + phandle_t node, >> >> > + const char *propname, >> >> > + int elsz, >> >> > + void **buf >> >> > +) >> >> > +{ >> >> > + size_t len; >> >> > + >> >> > + *buf = NULL; >> >> > + if ((len = rtems_ofw_get_prop_len(node, propname)) == -1 || >> >> > + (len % elsz != 0)) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + if (len > 0) { >> >> > + *buf = malloc(len); >> >> > + >> >> > + if (rtems_ofw_get_enc_prop(node, propname, *buf, len) == -1) { >> >> > + rtems_ofw_free(buf); >> >> > + *buf = NULL; >> >> > + return -1; >> >> > + } >> >> > + } >> >> > + >> >> > + return (len / elsz); >> >> > +} >> >> > + >> >> > +void rtems_ofw_free( void *buf ) >> >> > +{ >> >> > + free(buf); >> >> > +} >> >> > + >> >> > +int rtems_ofw_next_prop( >> >> > + phandle_t node, >> >> > + const char *previous, >> >> > + char *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + const void *name; >> >> > + const void *prop; >> >> > + int offset; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + if (offset < 0) { >> >> > + return -1; >> >> > + } >> >> > + >> >> > + if (previous == NULL) { >> >> > + offset = fdt_first_property_offset(fdtp, offset); >> >> > + } else { >> >> > + fdt_for_each_property_offset(offset, fdtp, offset) { >> >> > + prop = fdt_getprop_by_offset(fdtp, offset, (const char >> **)&name, NULL); >> >> > + if (prop == NULL) >> >> > + return -1; >> >> > + >> >> > + if (strcmp(previous, name) != 0) >> >> > + continue; >> >> > + >> >> > + offset = fdt_next_property_offset(fdtp, offset); >> >> > + break; >> >> > + } >> >> > + } >> >> > + >> >> > + if (offset < 0) >> >> > + return 0; >> >> > + >> >> > + prop = fdt_getprop_by_offset(fdtp, offset, (const char **)&name, >> &offset); >> >> > + if (prop == NULL) >> >> > + return -1; >> >> > + >> >> > + strncpy(buf, name, len); >> >> > + >> >> > + return 1; >> >> > +} >> >> > + >> >> > +int rtems_ofw_set_prop( >> >> > + phandle_t node, >> >> > + const char *name, >> >> > + const void *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + int offset; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + if (offset < 0) >> >> > + return -1; >> >> > + >> >> > + if (fdt_setprop_inplace(fdtp, offset, name, buf, len) != 0) >> >> > + return (fdt_setprop(fdtp, offset, name, buf, len)); >> >> > + >> >> > + return 0; >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_find_device( const char *path ) >> >> > +{ >> >> > + int offset; >> >> > + >> >> > + offset = fdt_path_offset(fdtp, path); >> >> > + if (offset < 0) >> >> > + return -1; >> >> > + >> >> > + return rtems_fdt_offset_to_phandle(offset); >> >> > +} >> >> > + >> >> > +static phandle_t rtems_ofw_get_effective_phandle( >> >> > + phandle_t node, >> >> > + phandle_t xref >> >> > +) >> >> > +{ >> >> > + phandle_t child; >> >> > + phandle_t ref; >> >> > + >> >> > + for (child = rtems_ofw_child(node); child != 0; child = >> rtems_ofw_peer(child)) { >> >> > + ref = rtems_ofw_get_effective_phandle(child, xref); >> >> > + if (ref != -1) >> >> > + return ref; >> >> > + >> >> > + if (rtems_ofw_get_enc_prop(child, "phandle", &ref, sizeof(ref)) >> == -1 && >> >> > + rtems_ofw_get_enc_prop(child, "ibm,phandle", &ref, >> sizeof(ref)) == -1 && >> >> > + rtems_ofw_get_enc_prop(child, "linux,phandle", &ref, >> sizeof(ref)) == -1 >> >> > + ) { >> >> > + continue; >> >> > + } >> >> > + >> >> > + if (ref == xref) >> >> > + return child; >> >> > + } >> >> > + >> >> > + return -1; >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_node_from_xref( phandle_t xref ) >> >> > +{ >> >> > + phandle_t node; >> >> > + >> >> > + if ((node = rtems_ofw_get_effective_phandle(rtems_ofw_peer(0), >> xref)) == -1) >> >> > + return xref; >> >> > + >> >> > + return node; >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_xref_from_node( phandle_t node ) >> >> > +{ >> >> > + phandle_t ref; >> >> > + >> >> > + if (rtems_ofw_get_enc_prop(node, "phandle", &ref, sizeof(ref)) >> == -1 && >> >> > + rtems_ofw_get_enc_prop(node, "ibm,phandle", &ref, >> sizeof(ref)) == -1 && >> >> > + rtems_ofw_get_enc_prop(node, "linux,phandle", &ref, >> sizeof(ref)) == -1) >> >> > + { >> >> > + return node; >> >> > + } >> >> > + >> >> > + return ref; >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_instance_to_package( ihandle_t instance ) >> >> > +{ >> >> > + return rtems_ofw_node_from_xref(instance); >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_package_to_path( >> >> > + phandle_t node, >> >> > + char *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + int offset; >> >> > + int rv; >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(node); >> >> > + >> >> > + rv = fdt_get_path(fdtp, offset, buf, len); >> >> > + if (rv != 0) >> >> > + return -1; >> >> > + >> >> > + return rv; >> >> > +} >> >> > + >> >> > +size_t rtems_ofw_instance_to_path( >> >> > + ihandle_t instance, >> >> > + char *buf, >> >> > + size_t len >> >> > +) >> >> > +{ >> >> > + int offset; >> >> > + int rv; >> >> > + >> >> > + offset = rtems_ofw_instance_to_package(instance); >> >> > + offset = rtems_fdt_phandle_to_offset(offset); >> >> > + >> >> > + rv = fdt_get_path(fdtp, offset, buf, len); >> >> > + if (rv != 0) >> >> > + return -1; >> >> > + >> >> > + return rv; >> >> > +} >> >> > + >> >> > +int rtems_ofw_get_reg( >> >> > + phandle_t node, >> >> > + rtems_ofw_memory_area *buf, >> >> > + size_t size >> >> > +) >> >> > +{ >> >> > + int len; >> >> > + int offset; >> >> > + int nranges; >> >> > + int nregs; >> >> > + phandle_t parent; >> >> > + rtems_ofw_ranges range; >> >> > + const rtems_ofw_ranges *ptr; >> >> > + >> >> > + len = rtems_ofw_get_enc_prop(node, "reg", (pcell_t *)buf, size); >> >> > + if (len <= 0) { >> >> > + return len; >> >> > + } >> >> > + >> >> > + nregs = MIN(len, size) / sizeof(rtems_ofw_memory_area); >> >> > + >> >> > + for (parent = rtems_ofw_parent(node); parent > 0; >> >> > + parent = rtems_ofw_parent(parent)) { >> >> > + >> >> > + offset = rtems_fdt_phandle_to_offset(parent); >> >> > + ptr = fdt_getprop(fdtp, offset, "ranges", &len); >> >> > + >> >> > + if (len < 0) { >> >> > + break; >> >> > + } >> >> > + >> >> > + nranges = len / sizeof(rtems_ofw_ranges); >> >> > + >> >> > + offset = 0; >> >> > + for (int i=0; i < nregs; i++) { >> >> > + for (int j=0; j < nranges; j++) { >> >> > + >> >> > + range.parent_bus = fdt32_to_cpu(ptr[j].parent_bus); >> >> > + range.child_bus = fdt32_to_cpu(ptr[j].child_bus); >> >> > + range.size = fdt32_to_cpu(ptr[j].size); >> >> > + >> >> > + if (buf[i].start >= range.child_bus && >> >> > + buf[i].start < range.child_bus + range.size) { >> >> > + offset = range.parent_bus - range.child_bus; >> >> > + break; >> >> > + } >> >> > + >> >> > + } >> >> > + buf[i].start += offset; >> >> > + } >> >> > + } >> >> > + >> >> > + return nregs; >> >> > +} >> >> > + >> >> > +int rtems_ofw_get_interrupts( >> >> > + phandle_t node, >> >> > + rtems_vector_number *buf, >> >> > + size_t size >> >> > +) >> >> > +{ >> >> > + int rv; >> >> > + >> >> > + rv = rtems_ofw_get_enc_prop(node, "interrupts", buf, size); >> >> > + >> >> > + if (rv <= 0) { >> >> > + return rv; >> >> > + } >> >> > + >> >> > + return MIN(size, rv) / sizeof(rtems_vector_number); >> >> > +} >> >> > + >> >> > +bool rtems_ofw_node_status( phandle_t node ) >> >> > +{ >> >> > + int len; >> >> > + const char buf[10]; >> >> > + >> >> > + len = rtems_ofw_get_prop(node, "status", &buf[0], sizeof(buf)); >> >> > + if ((len == -1) || >> >> > + (strncmp(buf, "okay", MIN(5, len)) == 0) || >> >> > + (strncmp(buf, "ok", MIN(3, len)) == 0)) { >> >> > + return true; >> >> > + } >> >> > + >> >> > + return false; >> >> > +} >> >> > + >> >> > +phandle_t rtems_ofw_find_device_by_compat( const char *compat ) >> >> > +{ >> >> > + int offset; >> >> > + >> >> > + offset = fdt_node_offset_by_compatible(fdtp, -1, compat); >> >> > + return rtems_fdt_offset_to_phandle(offset); >> >> > +} >> >> > diff --git a/spec/build/bsps/obj.yml b/spec/build/bsps/obj.yml >> >> > index 8809238057..141ba25f5e 100644 >> >> > --- a/spec/build/bsps/obj.yml >> >> > +++ b/spec/build/bsps/obj.yml >> >> > @@ -24,6 +24,9 @@ install: >> >> > - bsps/include/bsp/u-boot.h >> >> > - bsps/include/bsp/uart-output-char.h >> >> > - bsps/include/bsp/utility.h >> >> > +- destination: ${BSP_INCLUDEDIR}/ofw >> >> > + source: >> >> > + - bsps/include/ofw/ofw.h >> >> > - destination: ${BSP_INCLUDEDIR}/libchip >> >> > source: >> >> > - bsps/include/libchip/am29lv160.h >> >> > @@ -104,4 +107,5 @@ source: >> >> > - bsps/shared/dev/serial/z85c30_reg.c >> >> > - bsps/shared/start/bootcard.c >> >> > - bsps/shared/rtems-version.c >> >> > +- bsps/shared/ofw/ofw.c >> >> > type: build >> >> > -- >> >> > 2.17.1 >> >> > >> >
_______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
