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Smith" Subject: [PATCH v2 08/15] xen/dt: Move bootfdt functions to xen/bootfdt.h Date: Thu, 5 Jun 2025 21:48:00 +0200 Message-ID: <20250605194810.2782031-9-agarciav@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250605194810.2782031-1-agarciav@amd.com> References: <20250605194810.2782031-1-agarciav@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000055DE:EE_|LV3PR12MB9119:EE_ X-MS-Office365-Filtering-Correlation-Id: 63b0f128-3582-4ff5-ac98-08dda46a02b0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?xi+rJG6pTly3bY9yCINgvBFSuDZ7PqTXwyfnuWRLDB15yR1ymUtqnV6k3BCB?= =?us-ascii?Q?OgF2ID6EZuZPWwDiOogy8FOgkoa7naA1uk/Oje3uBYsBET7wvm7ZB3Q0HvsN?= =?us-ascii?Q?Zht/Z6HbCF2lc1wXRKljGNAVj+z+oyRWKeR1q2ZHHoeE6ltKQI7rB5Ug1uFi?= =?us-ascii?Q?hHvZ2g2x0LoPQBesznEy2J/iA5H3qi9/t3Impicg9dNwkVDPVsJwPc4t8Vxr?= =?us-ascii?Q?kKgZftfpGPJTDSXjnf/AHiV/lnqR7NmLBqw/iayYGb+Qv+qcM8cHtqKvE2RQ?= =?us-ascii?Q?0z7eZo8NnDB41CfaLBu1kMHylFTI45gmAIH80Ic5bYLODRtFgmhGbZ76RFv0?= =?us-ascii?Q?YGzMn5QvwiAwleu5Ld9ihSAfRTGcV+QL2/stgkJmUqo2MExOO3LglGuMi+7c?= =?us-ascii?Q?yUSr5897OoJ/ARq8kJt/XrOVjlrm2iV+VT2TZeoJOzFHTnwbqThV3ubBBosc?= =?us-ascii?Q?05DJiyGhltZrFJd507yXJ4w3ZwhCLOBRM9Hk4JNiEMHxED56vgEgkbihuLll?= =?us-ascii?Q?Q4CicGhulV+cqmW2PUWAKlMUMHYfbGxQW38NlmDgQDZusoyEc0tL8BFzBGOk?= =?us-ascii?Q?Fz+eluGFdx32VVHTbXNFrwSsSQCoJRqEvzve8njNKJQA/3Ar3EQSrJQgARKF?= =?us-ascii?Q?JPGupBW63ypLjEiQZ2SvjqjH6NGrQoLREpnMj4GEA7fvbE7vvk0tbFETFbvx?= =?us-ascii?Q?8UnTMvcyHdOiEkT8icMz4LZR3sHUlEthK3d6EC5uzU+LuScI76XxGCTUNzsM?= =?us-ascii?Q?GevsYGzDKtuRiWPlSkEiw+A9J970mhAdKmk6a3xCavMG2wZ5OE/OVq3FVv+7?= =?us-ascii?Q?0xEhlduBgZdgdoiYQmKYgk2gtrmiV5pmcLzR9k7PdwHDgSr5ZYKZIx8MkX2J?= =?us-ascii?Q?nfT6BsYer650b9ywoMKDAJ5kvkwcnMmvunVwDpHDEf9Pn5E7+t5UCrfoX3Bs?= =?us-ascii?Q?ckmNUHTRphOufuuE/Q8Xn7xvMEqs27q5eDNUDTthvHOv3eZ7x/iHTPry549P?= =?us-ascii?Q?8zGUsy4U8w5KnQPTuMRjQ70xXzBECeMrvAFwRepuITTJACF1FTe9TMZcnDz7?= =?us-ascii?Q?at7WJr3p2VC81Aq7+7WhedXXSfTIfeV1F8xlkYJKZPU5Usgz2atz7uG2qVxR?= =?us-ascii?Q?obzgdlEhyCaEqd73eG9IW71c5FtKPOP/qL3x69iOM/k7gtc28EI/+aZyrymS?= =?us-ascii?Q?pbr6F/rVBwKtqvFQlW/XXjxCxDC8jTaXR7OSZYHQZO9H/RGVQvkaqgRZqhCK?= =?us-ascii?Q?zDypRJ1kCo+xvxCgHqPykYHhBSRkwVCKEjtOZz8bNcCmTtLtATWl1nd/YZZ0?= =?us-ascii?Q?nOiuEC76Ouyob8LDDgh7cpN6eG8Z7EMXtVTIKZNBpDIUWcVirbYB63l7VV+3?= =?us-ascii?Q?3/BgzFV9IXSFUacSFvdeXZXBjavqUoAukmHnkm+wbjAH0q1IqJ8XXnUgC5Ux?= =?us-ascii?Q?Fh0FZdVq2BFUT7hleb88I4yBQn/r7s69PBUtdAVD5werqpszZ2r5MLTromV7?= =?us-ascii?Q?+AbdHT0GRCqAoGHTOJxkLB1NXh9P2vQRgSE0?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(376014)(1800799024)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jun 2025 19:48:57.4665 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 63b0f128-3582-4ff5-ac98-08dda46a02b0 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000055DE.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9119 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1749152970655116600 Content-Type: text/plain; charset="utf-8" Part of an unpicking process to extract bootfdt contents independent of boo= tinfo to a separate file for x86 to take. Move functions required for early FDT parsing from device_tree.h and arm's setup.h onto bootfdt.h Declaration motion only. Not a functional change. Signed-off-by: Alejandro Vallejo --- v2: * Remove the u32 identifiers in the device_tree_get_u32() implementation * Fix an existing const-stripping case. --- xen/arch/arm/include/asm/setup.h | 6 ---- xen/common/device-tree/bootfdt.c | 8 ++--- xen/include/xen/bootfdt.h | 62 ++++++++++++++++++++++++++++++++ xen/include/xen/device_tree.h | 34 +----------------- 4 files changed, 67 insertions(+), 43 deletions(-) diff --git a/xen/arch/arm/include/asm/setup.h b/xen/arch/arm/include/asm/se= tup.h index 6cf272c160..2b58549c1a 100644 --- a/xen/arch/arm/include/asm/setup.h +++ b/xen/arch/arm/include/asm/setup.h @@ -53,12 +53,6 @@ void setup_mm(void); extern uint32_t hyp_traps_vector[]; void init_traps(void); =20 -void device_tree_get_reg(const __be32 **cell, uint32_t address_cells, - uint32_t size_cells, paddr_t *start, paddr_t *siz= e); - -u32 device_tree_get_u32(const void *fdt, int node, - const char *prop_name, u32 dflt); - int handle_device(struct domain *d, struct dt_device_node *dev, p2m_type_t= p2mt, struct rangeset *iomem_ranges, struct rangeset *irq_rang= es); =20 diff --git a/xen/common/device-tree/bootfdt.c b/xen/common/device-tree/boot= fdt.c index 9daea06e57..ab449db8d6 100644 --- a/xen/common/device-tree/bootfdt.c +++ b/xen/common/device-tree/bootfdt.c @@ -202,16 +202,16 @@ static int __init device_tree_get_meminfo(const void = *fdt, int node, return 0; } =20 -u32 __init device_tree_get_u32(const void *fdt, int node, - const char *prop_name, u32 dflt) +uint32_t __init device_tree_get_u32(const void *fdt, int node, + const char *prop_name, uint32_t dflt) { const struct fdt_property *prop; =20 prop =3D fdt_get_property(fdt, node, prop_name, NULL); - if ( !prop || prop->len < sizeof(u32) ) + if ( !prop || prop->len < sizeof(uint32_t) ) return dflt; =20 - return fdt32_to_cpu(*(uint32_t*)prop->data); + return fdt32_to_cpu(*(const uint32_t*)prop->data); } =20 /** diff --git a/xen/include/xen/bootfdt.h b/xen/include/xen/bootfdt.h index 19d2ff0f0c..1b89986e10 100644 --- a/xen/include/xen/bootfdt.h +++ b/xen/include/xen/bootfdt.h @@ -2,6 +2,7 @@ #ifndef XEN_BOOTFDT_H #define XEN_BOOTFDT_H =20 +#include #include #include #include @@ -16,8 +17,53 @@ #define NR_MEM_BANKS 256 #define NR_SHMEM_BANKS 32 =20 +/* Default #address and #size cells */ +#define DT_ROOT_NODE_ADDR_CELLS_DEFAULT 2 +#define DT_ROOT_NODE_SIZE_CELLS_DEFAULT 1 + #define MAX_MODULES 32 /* Current maximum useful modules */ =20 +#define DEVICE_TREE_MAX_DEPTH 16 + +/* Helper to read a big number; size is in cells (not bytes) */ +static inline u64 dt_read_number(const __be32 *cell, int size) +{ + u64 r =3D 0; + + while ( size-- ) + r =3D (r << 32) | be32_to_cpu(*(cell++)); + return r; +} + +static inline u64 dt_next_cell(int s, const __be32 **cellp) +{ + const __be32 *p =3D *cellp; + + *cellp =3D p + s; + return dt_read_number(p, s); +} + +typedef int (*device_tree_node_func)(const void *fdt, + int node, const char *name, int depth, + u32 address_cells, u32 size_cells, + void *data); + +/** + * device_tree_for_each_node - iterate over all device tree sub-nodes + * @fdt: flat device tree. + * @node: parent node to start the search from + * @func: function to call for each sub-node. + * @data: data to pass to @func. + * + * Any nodes nested at DEVICE_TREE_MAX_DEPTH or deeper are ignored. + * + * Returns 0 if all nodes were iterated over successfully. If @func + * returns a value different from 0, that value is returned immediately. + */ +int device_tree_for_each_node(const void *fdt, int node, + device_tree_node_func func, + void *data); + typedef enum { BOOTMOD_XEN, BOOTMOD_FDT, @@ -261,4 +307,20 @@ static inline struct membanks *membanks_xzalloc(unsign= ed int nr, return banks; } =20 +/* + * Interpret the property `prop_name` of `node` as a u32. + * + * Returns the property value on success; otherwise returns `dflt`. + */ +uint32_t device_tree_get_u32(const void *fdt, int node, + const char *prop_name, uint32_t dflt); + +/* + * Interpret the property `prop_name` of `node` as a "reg". + * + * Returns outputs in `start` and `size`. + */ +void device_tree_get_reg(const __be32 **cell, uint32_t address_cells, + uint32_t size_cells, paddr_t *start, paddr_t *siz= e); + #endif /* XEN_BOOTFDT_H */ diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index 6dc1fb5159..0a22b1ba1d 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -10,6 +10,7 @@ #ifndef __XEN_DEVICE_TREE_H__ #define __XEN_DEVICE_TREE_H__ =20 +#include #include =20 #include @@ -22,8 +23,6 @@ #include #include =20 -#define DEVICE_TREE_MAX_DEPTH 16 - /* * Struct used for matching a device */ @@ -164,17 +163,8 @@ struct dt_raw_irq { u32 specifier[DT_MAX_IRQ_SPEC]; }; =20 -typedef int (*device_tree_node_func)(const void *fdt, - int node, const char *name, int depth, - u32 address_cells, u32 size_cells, - void *data); - extern const void *device_tree_flattened; =20 -int device_tree_for_each_node(const void *fdt, int node, - device_tree_node_func func, - void *data); - /** * dt_unflatten_host_device_tree - Unflatten the host device tree * @@ -245,10 +235,6 @@ void intc_dt_preinit(void); #define dt_node_cmp(s1, s2) strcasecmp((s1), (s2)) #define dt_compat_cmp(s1, s2) strcasecmp((s1), (s2)) =20 -/* Default #address and #size cells */ -#define DT_ROOT_NODE_ADDR_CELLS_DEFAULT 2 -#define DT_ROOT_NODE_SIZE_CELLS_DEFAULT 1 - #define dt_for_each_property_node(dn, pp) \ for ( pp =3D (dn)->properties; (pp) !=3D NULL; pp =3D (pp)->next ) =20 @@ -258,16 +244,6 @@ void intc_dt_preinit(void); #define dt_for_each_child_node(dt, dn) \ for ( dn =3D (dt)->child; (dn) !=3D NULL; dn =3D (dn)->sibling ) =20 -/* Helper to read a big number; size is in cells (not bytes) */ -static inline u64 dt_read_number(const __be32 *cell, int size) -{ - u64 r =3D 0; - - while ( size-- ) - r =3D (r << 32) | be32_to_cpu(*(cell++)); - return r; -} - /* Wrapper for dt_read_number() to return paddr_t (instead of uint64_t) */ static inline paddr_t dt_read_paddr(const __be32 *cell, int size) { @@ -307,14 +283,6 @@ static inline int dt_size_to_cells(int bytes) return (bytes / sizeof(u32)); } =20 -static inline u64 dt_next_cell(int s, const __be32 **cellp) -{ - const __be32 *p =3D *cellp; - - *cellp =3D p + s; - return dt_read_number(p, s); -} - static inline const char *dt_node_full_name(const struct dt_device_node *n= p) { return (np && np->full_name) ? np->full_name : ""; --=20 2.43.0