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| -rw-r--r-- | drivers/arm/ccn/ccn_private.h | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/arm/ccn/ccn_private.h b/drivers/arm/ccn/ccn_private.h new file mode 100644 index 0000000..8a936d9 --- /dev/null +++ b/drivers/arm/ccn/ccn_private.h @@ -0,0 +1,233 @@ +/* + * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef CCN_PRIVATE_H +#define CCN_PRIVATE_H + +/* + * A CCN implementation can have a maximum of 64 Request nodes with node IDs + * from 0-63. These IDs are split across the three types of Request nodes + * i.e. RN-F, RN-D and RN-I. + */ +#define MAX_RN_NODES 64 + +/* Enum used to loop through the 3 types of Request nodes */ +typedef enum rn_types { + RN_TYPE_RNF = 0, + RN_TYPE_RNI, + RN_TYPE_RND, + NUM_RN_TYPES +} rn_types_t; + +/* Macro to convert a region id to its base address */ +#define region_id_to_base(id) ((id) << 16) + +/* + * Macro to calculate the number of master interfaces resident on a RN-I/RN-D. + * Value of first two bits of the RN-I/D node type + 1 == Maximum number of + * ACE-Lite or ACE-Lite+DVM interfaces supported on this node. E.g. + * + * 0x14 : RN-I with 1 ACE-Lite interface + * 0x15 : RN-I with 2 ACE-Lite interfaces + * 0x16 : RN-I with 3 ACE-Lite interfaces + */ +#define rn_type_id_to_master_cnt(id) (((id) & 0x3) + 1) + +/* + * Constants used to identify a region in the programmer's view. These are + * common for all regions. + */ +#define REGION_ID_LIMIT 256 +#define REGION_ID_OFFSET 0xFF00 + +#define REGION_NODE_ID_SHIFT 8 +#define REGION_NODE_ID_MASK 0x7f +#define get_node_id(id_reg) (((id_reg) >> REGION_NODE_ID_SHIFT) \ + & REGION_NODE_ID_MASK) + +#define REGION_NODE_TYPE_SHIFT 0 +#define REGION_NODE_TYPE_MASK 0x1f +#define get_node_type(id_reg) (((id_reg) >> REGION_NODE_TYPE_SHIFT) \ + & REGION_NODE_TYPE_MASK) + +/* Common offsets of registers to enter or exit a snoop/dvm domain */ +#define DOMAIN_CTRL_STAT_OFFSET 0x0200 +#define DOMAIN_CTRL_SET_OFFSET 0x0210 +#define DOMAIN_CTRL_CLR_OFFSET 0x0220 + +/* + * Thess macros are used to determine if an operation to add or remove a Request + * node from the snoop/dvm domain has completed. 'rn_id_map' is a bit map of + * nodes. It was used to program the SET or CLEAR control register. The type of + * register is specified by 'op_reg_offset'. 'status_reg' is the bit map of + * nodes currently present in the snoop/dvm domain. 'rn_id_map' and 'status_reg' + * are logically ANDed and the result it stored back in the 'status_reg'. There + * are two outcomes of this operation: + * + * 1. If the DOMAIN_CTRL_SET_OFFSET register was programmed, then the set bits in + * 'rn_id_map' should appear in 'status_reg' when the operation completes. So + * after the AND operation, at some point of time 'status_reg' should equal + * 'rn_id_map'. + * + * 2. If the DOMAIN_CTRL_CLR_OFFSET register was programmed, then the set bits in + * 'rn_id_map' should disappear in 'status_reg' when the operation + * completes. So after the AND operation, at some point of time 'status_reg' + * should equal 0. + */ +#define WAIT_FOR_DOMAIN_CTRL_OP_COMPLETION(region_id, stat_reg_offset, \ + op_reg_offset, rn_id_map) \ + { \ + unsigned long long status_reg; \ + do { \ + status_reg = ccn_reg_read((ccn_plat_desc->periphbase), \ + (region_id), \ + (stat_reg_offset)); \ + status_reg &= (rn_id_map); \ + } while ((op_reg_offset) == DOMAIN_CTRL_SET_OFFSET ? \ + (rn_id_map) != status_reg : status_reg); \ + } + +/* + * Region ID of the Miscellaneous Node is always 0 as its located at the base of + * the programmer's view. + */ +#define MN_REGION_ID 0 + +#define MN_REGION_ID_START 0 +#define DEBUG_REGION_ID_START 1 +#define HNI_REGION_ID_START 8 +#define SBSX_REGION_ID_START 16 +#define HNF_REGION_ID_START 32 +#define XP_REGION_ID_START 64 +#define RNI_REGION_ID_START 128 + +/* Selected register offsets from the base of a HNF region */ +#define HNF_CFG_CTRL_OFFSET 0x0000 +#define HNF_SAM_CTRL_OFFSET 0x0008 +#define HNF_PSTATE_REQ_OFFSET 0x0010 +#define HNF_PSTATE_STAT_OFFSET 0x0018 +#define HNF_SDC_STAT_OFFSET DOMAIN_CTRL_STAT_OFFSET +#define HNF_SDC_SET_OFFSET DOMAIN_CTRL_SET_OFFSET +#define HNF_SDC_CLR_OFFSET DOMAIN_CTRL_CLR_OFFSET +#define HNF_AUX_CTRL_OFFSET 0x0500 + +/* Selected register offsets from the base of a MN region */ +#define MN_SAR_OFFSET 0x0000 +#define MN_RNF_NODEID_OFFSET 0x0180 +#define MN_RNI_NODEID_OFFSET 0x0190 +#define MN_RND_NODEID_OFFSET 0x01A0 +#define MN_HNF_NODEID_OFFSET 0x01B0 +#define MN_HNI_NODEID_OFFSET 0x01C0 +#define MN_SN_NODEID_OFFSET 0x01D0 +#define MN_DDC_STAT_OFFSET DOMAIN_CTRL_STAT_OFFSET +#define MN_DDC_SET_OFFSET DOMAIN_CTRL_SET_OFFSET +#define MN_DDC_CLR_OFFSET DOMAIN_CTRL_CLR_OFFSET +#define MN_PERIPH_ID_0_1_OFFSET 0xFE0 +#define MN_ID_OFFSET REGION_ID_OFFSET + +/* HNF System Address Map register bit masks and shifts */ +#define HNF_SAM_CTRL_SN_ID_MASK 0x7f +#define HNF_SAM_CTRL_SN0_ID_SHIFT 0 +#define HNF_SAM_CTRL_SN1_ID_SHIFT 8 +#define HNF_SAM_CTRL_SN2_ID_SHIFT 16 + +#define HNF_SAM_CTRL_TAB0_MASK ULL(0x3f) +#define HNF_SAM_CTRL_TAB0_SHIFT 48 +#define HNF_SAM_CTRL_TAB1_MASK ULL(0x3f) +#define HNF_SAM_CTRL_TAB1_SHIFT 56 + +#define HNF_SAM_CTRL_3SN_ENB_SHIFT 32 +#define HNF_SAM_CTRL_3SN_ENB_MASK ULL(0x01) + +/* + * Macro to create a value suitable for programming into a HNF SAM Control + * register for enabling 3SN striping. + */ +#define MAKE_HNF_SAM_CTRL_VALUE(sn0, sn1, sn2, tab0, tab1, three_sn_en) \ + ((((sn0) & HNF_SAM_CTRL_SN_ID_MASK) << HNF_SAM_CTRL_SN0_ID_SHIFT) | \ + (((sn1) & HNF_SAM_CTRL_SN_ID_MASK) << HNF_SAM_CTRL_SN1_ID_SHIFT) | \ + (((sn2) & HNF_SAM_CTRL_SN_ID_MASK) << HNF_SAM_CTRL_SN2_ID_SHIFT) | \ + (((tab0) & HNF_SAM_CTRL_TAB0_MASK) << HNF_SAM_CTRL_TAB0_SHIFT) | \ + (((tab1) & HNF_SAM_CTRL_TAB1_MASK) << HNF_SAM_CTRL_TAB1_SHIFT) | \ + (((three_sn_en) & HNF_SAM_CTRL_3SN_ENB_MASK) << HNF_SAM_CTRL_3SN_ENB_SHIFT)) + +/* Mask to read the power state value from an HN-F P-state register */ +#define HNF_PSTATE_MASK 0xf + +/* Macro to extract the run mode from a p-state value */ +#define PSTATE_TO_RUN_MODE(pstate) (((pstate) & HNF_PSTATE_MASK) >> 2) + +/* + * Helper macro that iterates through a given bit map. In each iteration, + * it returns the position of the set bit. + * It can be used by other utility macros to iterates through all nodes + * or masters given a bit map of them. + */ +#define FOR_EACH_BIT(bit_pos, bit_map) \ + for (bit_pos = __builtin_ctzll(bit_map); \ + bit_map; \ + bit_map &= ~(1ULL << (bit_pos)), \ + bit_pos = __builtin_ctzll(bit_map)) + +/* + * Utility macro that iterates through a bit map of node IDs. In each + * iteration, it returns the ID of the next present node in the bit map. Node + * ID of a present node == Position of set bit == Number of zeroes trailing the + * bit. + */ +#define FOR_EACH_PRESENT_NODE_ID(node_id, bit_map) \ + FOR_EACH_BIT(node_id, bit_map) + +/* + * Helper function to return number of set bits in bitmap + */ +static inline unsigned int count_set_bits(unsigned long long bitmap) +{ + unsigned int count = 0; + + for (; bitmap; bitmap &= bitmap - 1) + ++count; + + return count; +} + +/* + * Utility macro that iterates through a bit map of node IDs. In each iteration, + * it returns the ID of the next present region corresponding to a node present + * in the bit map. Region ID of a present node is in between passed region id + * and region id + number of set bits in the bitmap i.e. the number of present + * nodes. + */ +#define FOR_EACH_PRESENT_REGION_ID(region_id, bit_map) \ + for (unsigned long long region_id_limit = count_set_bits(bit_map) \ + + region_id; \ + region_id < region_id_limit; \ + region_id++) + +/* + * Same macro as FOR_EACH_PRESENT_NODE, but renamed to indicate it traverses + * through a bit map of master interfaces. + */ +#define FOR_EACH_PRESENT_MASTER_INTERFACE(iface_id, bit_map) \ + FOR_EACH_BIT(iface_id, bit_map) + +/* + * Macro that returns the node id bit map for the Miscellaneous Node + */ +#define CCN_GET_MN_NODEID_MAP(periphbase) \ + (1 << get_node_id(ccn_reg_read(periphbase, MN_REGION_ID, \ + REGION_ID_OFFSET))) + +/* + * This macro returns the bitmap of Home nodes on the basis of the + * 'mn_hn_id_reg_offset' parameter from the Miscellaneous node's (MN) + * programmer's view. The MN has a register which carries the bitmap of present + * Home nodes of each type i.e. HN-Fs, HN-Is & HN-Ds. + */ +#define CCN_GET_HN_NODEID_MAP(periphbase, mn_hn_id_reg_offset) \ + ccn_reg_read(periphbase, MN_REGION_ID, mn_hn_id_reg_offset) + +#endif /* CCN_PRIVATE_H */ |