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Diffstat (limited to 'include/drivers/arm/ccn.h')
| -rw-r--r-- | include/drivers/arm/ccn.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/drivers/arm/ccn.h b/include/drivers/arm/ccn.h new file mode 100644 index 00000000..d7408677 --- /dev/null +++ b/include/drivers/arm/ccn.h @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef __CCN_H__ +#define __CCN_H__ + +/* + * This macro defines the maximum number of master interfaces that reside on + * Request nodes which the CCN driver can accommodate. The driver APIs to add + * and remove Request nodes from snoop/dvm domains take a bit map of master + * interfaces as inputs. The largest C data type that can be used is a 64-bit + * unsigned integer. Hence the value of 64. The platform will have to ensure + * that the master interfaces are numbered from 0-63. + */ +#define CCN_MAX_RN_MASTERS 64 + +/* + * The following constants define the various run modes that the platform can + * request the CCN driver to place the L3 cache in. These map to the + * programmable P-State values in a HN-F P-state register. + */ +#define CCN_L3_RUN_MODE_NOL3 0x0 /* HNF_PM_NOL3 */ +#define CCN_L3_RUN_MODE_SFONLY 0x1 /* HNF_PM_SFONLY */ +#define CCN_L3_RUN_MODE_HAM 0x2 /* HNF_PM_HALF */ +#define CCN_L3_RUN_MODE_FAM 0x3 /* HNF_PM_FULL */ + +/* part 0 IDs for various CCN variants */ +#define CCN_502_PART0_ID 0x30 +#define CCN_504_PART0_ID 0x26 +#define CCN_505_PART0_ID 0x27 +#define CCN_508_PART0_ID 0x28 +#define CCN_512_PART0_ID 0x29 + +/* + * The following macro takes the value returned from a read of a HN-F P-state + * status register and returns the retention state value. + */ +#define CCN_GET_RETENTION_STATE(pstate) ((pstate >> 4) & 0x3) + +/* + * The following macro takes the value returned from a read of a HN-F P-state + * status register and returns the run state value. + */ +#define CCN_GET_RUN_STATE(pstate) (pstate & 0xf) + +#ifndef __ASSEMBLY__ +#include <stdint.h> + +/* + * This structure describes some of the implementation defined attributes of the + * CCN IP. It is used by the platform port to specify these attributes in order + * to initialise the CCN driver. The attributes are described below. + * + * 1. The 'num_masters' field specifies the total number of master interfaces + * resident on Request nodes. + * + * 2. The 'master_to_rn_id_map' field is a ponter to an array in which each + * index corresponds to a master interface and its value corresponds to the + * Request node on which the master interface resides. + * This field is not simply defined as an array of size CCN_MAX_RN_MASTERS. + * In reality, a platform will have much fewer master * interfaces than + * CCN_MAX_RN_MASTERS. With an array of this size, it would also have to + * set the unused entries to a suitable value. Zeroing the array would not + * be enough since 0 is also a valid node id. Hence, such an array is not + * used. + * + * 3. The 'periphbase' field is the base address of the programmer's view of the + * CCN IP. + */ +typedef struct ccn_desc { + unsigned int num_masters; + const unsigned char *master_to_rn_id_map; + uintptr_t periphbase; +} ccn_desc_t; + + +void ccn_init(const ccn_desc_t *plat_ccn_desc); +void ccn_enter_snoop_dvm_domain(unsigned long long master_iface_map); +void ccn_exit_snoop_dvm_domain(unsigned long long master_iface_map); +void ccn_enter_dvm_domain(unsigned long long master_iface_map); +void ccn_exit_dvm_domain(unsigned long long master_iface_map); +void ccn_set_l3_run_mode(unsigned int mode); +void ccn_program_sys_addrmap(unsigned int sn0_id, + unsigned int sn1_id, + unsigned int sn2_id, + unsigned int top_addr_bit0, + unsigned int top_addr_bit1, + unsigned char three_sn_en); +unsigned int ccn_get_l3_run_mode(void); +int ccn_get_part0_id(uintptr_t periphbase); + +#endif /* __ASSEMBLY__ */ +#endif /* __CCN_H__ */ |