1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef __CCN_H__ 8 #define __CCN_H__ 9 10 /* 11 * This macro defines the maximum number of master interfaces that reside on 12 * Request nodes which the CCN driver can accommodate. The driver APIs to add 13 * and remove Request nodes from snoop/dvm domains take a bit map of master 14 * interfaces as inputs. The largest C data type that can be used is a 64-bit 15 * unsigned integer. Hence the value of 64. The platform will have to ensure 16 * that the master interfaces are numbered from 0-63. 17 */ 18 #define CCN_MAX_RN_MASTERS 64 19 20 /* 21 * The following constants define the various run modes that the platform can 22 * request the CCN driver to place the L3 cache in. These map to the 23 * programmable P-State values in a HN-F P-state register. 24 */ 25 #define CCN_L3_RUN_MODE_NOL3 0x0 /* HNF_PM_NOL3 */ 26 #define CCN_L3_RUN_MODE_SFONLY 0x1 /* HNF_PM_SFONLY */ 27 #define CCN_L3_RUN_MODE_HAM 0x2 /* HNF_PM_HALF */ 28 #define CCN_L3_RUN_MODE_FAM 0x3 /* HNF_PM_FULL */ 29 30 /* part 0 IDs for various CCN variants */ 31 #define CCN_502_PART0_ID 0x30 32 #define CCN_504_PART0_ID 0x26 33 #define CCN_505_PART0_ID 0x27 34 #define CCN_508_PART0_ID 0x28 35 #define CCN_512_PART0_ID 0x29 36 37 /* 38 * The following macro takes the value returned from a read of a HN-F P-state 39 * status register and returns the retention state value. 40 */ 41 #define CCN_GET_RETENTION_STATE(pstate) ((pstate >> 4) & 0x3) 42 43 /* 44 * The following macro takes the value returned from a read of a HN-F P-state 45 * status register and returns the run state value. 46 */ 47 #define CCN_GET_RUN_STATE(pstate) (pstate & 0xf) 48 49 #ifndef __ASSEMBLY__ 50 #include <stdint.h> 51 52 /* 53 * This structure describes some of the implementation defined attributes of the 54 * CCN IP. It is used by the platform port to specify these attributes in order 55 * to initialise the CCN driver. The attributes are described below. 56 * 57 * 1. The 'num_masters' field specifies the total number of master interfaces 58 * resident on Request nodes. 59 * 60 * 2. The 'master_to_rn_id_map' field is a ponter to an array in which each 61 * index corresponds to a master interface and its value corresponds to the 62 * Request node on which the master interface resides. 63 * This field is not simply defined as an array of size CCN_MAX_RN_MASTERS. 64 * In reality, a platform will have much fewer master * interfaces than 65 * CCN_MAX_RN_MASTERS. With an array of this size, it would also have to 66 * set the unused entries to a suitable value. Zeroing the array would not 67 * be enough since 0 is also a valid node id. Hence, such an array is not 68 * used. 69 * 70 * 3. The 'periphbase' field is the base address of the programmer's view of the 71 * CCN IP. 72 */ 73 typedef struct ccn_desc { 74 unsigned int num_masters; 75 const unsigned char *master_to_rn_id_map; 76 uintptr_t periphbase; 77 } ccn_desc_t; 78 79 80 void ccn_init(const ccn_desc_t *plat_ccn_desc); 81 void ccn_enter_snoop_dvm_domain(unsigned long long master_iface_map); 82 void ccn_exit_snoop_dvm_domain(unsigned long long master_iface_map); 83 void ccn_enter_dvm_domain(unsigned long long master_iface_map); 84 void ccn_exit_dvm_domain(unsigned long long master_iface_map); 85 void ccn_set_l3_run_mode(unsigned int mode); 86 void ccn_program_sys_addrmap(unsigned int sn0_id, 87 unsigned int sn1_id, 88 unsigned int sn2_id, 89 unsigned int top_addr_bit0, 90 unsigned int top_addr_bit1, 91 unsigned char three_sn_en); 92 unsigned int ccn_get_l3_run_mode(void); 93 int ccn_get_part0_id(uintptr_t periphbase); 94 95 #endif /* __ASSEMBLY__ */ 96 #endif /* __CCN_H__ */ 97