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fd6007de64
This patch adds a device driver which can be used to program the following aspects of ARM CCN IP: 1. Specify the mapping between ACE/ACELite/ACELite+DVM/CHI master interfaces and Request nodes. 2. Add and remove master interfaces from the snoop and dvm domains. 3. Place the L3 cache in a given power state. 4. Configuring system adress map and enabling 3 SN striping mode of memory controller operation. Change-Id: I0f665c6a306938e5b66f6a92f8549b529aa8f325
112 lines
4.7 KiB
C
112 lines
4.7 KiB
C
/*
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* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __CCN_H__
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#define __CCN_H__
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/*
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* This macro defines the maximum number of master interfaces that reside on
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* Request nodes which the CCN driver can accommodate. The driver APIs to add
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* and remove Request nodes from snoop/dvm domains take a bit map of master
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* interfaces as inputs. The largest C data type that can be used is a 64-bit
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* unsigned integer. Hence the value of 64. The platform will have to ensure
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* that the master interfaces are numbered from 0-63.
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*/
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#define CCN_MAX_RN_MASTERS 64
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/*
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* The following constants define the various run modes that the platform can
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* request the CCN driver to place the L3 cache in. These map to the
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* programmable P-State values in a HN-F P-state register.
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*/
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#define CCN_L3_RUN_MODE_NOL3 0x0 /* HNF_PM_NOL3 */
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#define CCN_L3_RUN_MODE_SFONLY 0x1 /* HNF_PM_SFONLY */
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#define CCN_L3_RUN_MODE_HAM 0x2 /* HNF_PM_HALF */
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#define CCN_L3_RUN_MODE_FAM 0x3 /* HNF_PM_FULL */
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/*
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* The following macro takes the value returned from a read of a HN-F P-state
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* status register and returns the retention state value.
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*/
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#define CCN_GET_RETENTION_STATE(pstate) ((pstate >> 4) & 0x3)
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/*
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* The following macro takes the value returned from a read of a HN-F P-state
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* status register and returns the run state value.
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*/
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#define CCN_GET_RUN_STATE(pstate) (pstate & 0xf)
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#ifndef __ASSEMBLY__
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#include <stdint.h>
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/*
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* This structure describes some of the implementation defined attributes of the
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* CCN IP. It is used by the platform port to specify these attributes in order
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* to initialise the CCN driver. The attributes are described below.
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*
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* 1. The 'num_masters' field specifies the total number of master interfaces
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* resident on Request nodes.
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*
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* 2. The 'master_to_rn_id_map' field is a ponter to an array in which each
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* index corresponds to a master interface and its value corresponds to the
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* Request node on which the master interface resides.
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* This field is not simply defined as an array of size CCN_MAX_RN_MASTERS.
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* In reality, a platform will have much fewer master * interfaces than
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* CCN_MAX_RN_MASTERS. With an array of this size, it would also have to
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* set the unused entries to a suitable value. Zeroing the array would not
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* be enough since 0 is also a valid node id. Hence, such an array is not
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* used.
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*
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* 3. The 'periphbase' field is the base address of the programmer's view of the
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* CCN IP.
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*/
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typedef struct ccn_desc {
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unsigned int num_masters;
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const unsigned char *master_to_rn_id_map;
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uintptr_t periphbase;
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} ccn_desc_t;
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void ccn_init(const ccn_desc_t *plat_ccn_desc);
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void ccn_enter_snoop_dvm_domain(unsigned long long master_iface_map);
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void ccn_exit_snoop_dvm_domain(unsigned long long master_iface_map);
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void ccn_enter_dvm_domain(unsigned long long master_iface_map);
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void ccn_exit_dvm_domain(unsigned long long master_iface_map);
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void ccn_set_l3_run_mode(unsigned int mode);
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void ccn_program_sys_addrmap(unsigned int sn0_id,
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unsigned int sn1_id,
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unsigned int sn2_id,
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unsigned int top_addr_bit0,
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unsigned int top_addr_bit1,
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unsigned char three_sn_en);
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unsigned int ccn_get_l3_run_mode(void);
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#endif /* __ASSEMBLY__ */
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#endif /* __CCN_H__ */
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