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blackmagic/src/adiv5.c

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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2015 Black Sphere Technologies Ltd.
* Written by Gareth McMullin <gareth@blacksphere.co.nz>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This file implements the transport generic functions of the
* ARM Debug Interface v5 Architecure Specification, ARM doc IHI0031A.
*/
#include "general.h"
#include "jtag_scan.h"
#include "gdb_packet.h"
#include "adiv5.h"
#include "cortexm.h"
#include "exception.h"
#ifndef DO_RESET_SEQ
#define DO_RESET_SEQ 0
#endif
/* All this should probably be defined in a dedicated ADIV5 header, so that they
* are consistently named and accessible when needed in the codebase.
*/
/* ROM table CIDR values */
#define CIDR0_OFFSET 0xFF0 /* DBGCID0 */
#define CIDR1_OFFSET 0xFF4 /* DBGCID1 */
#define CIDR2_OFFSET 0xFF8 /* DBGCID2 */
#define CIDR3_OFFSET 0xFFC /* DBGCID3 */
/* Component class ID register can be broken down into the following logical
* interpretation of the 32bit value consisting of the least significant bytes
* of the 4 CID registers:
* |7 ID3 reg 0|7 ID2 reg 0|7 ID1 reg 0|7 ID0 reg 0|
* |1|0|1|1|0|0|0|1|0|0|0|0|0|1|0|1| | | | |0|0|0|0|0|0|0|0|1|1|0|1|
* |31 24|23 16|15 12|11 | 0|
* \_______________ ______________/\___ __/\___________ ___________/
* V V V
* Preamble Component Preamble
* Class
* \_______________________________ _______________________________/
* V
* Component ID
*/
#define CID_PREAMBLE 0xB105000D
#define CID_CLASS_MASK 0x0000F000
#define CID_CLASS_SHIFT 12
/* The following enum is based on the Component Class value table 13-3 of the
* ADIv5 standard.
*/
enum cid_class {
cidc_gvc = 0x0, /* Generic verification component*/
cidc_romtab = 0x1, /* ROM Table, std. layout (ADIv5 Chapter 14) */
/* 0x2 - 0x8 */ /* Reserved */
cidc_dc = 0x9, /* Debug component, std. layout (CoreSight Arch. Spec.) */
/* 0xA */ /* Reserved */
cidc_ptb = 0xB, /* Peripheral Test Block (PTB) */
/* 0xC */ /* Reserved */
cidc_dess = 0xD, /* OptimoDE Data Engine SubSystem (DESS) component */
cidc_gipc = 0xE, /* Generic IP Component */
cidc_pcp = 0xF, /* PrimeCell peripheral */
cidc_unknown = 0x10
};
#ifdef PLATFORM_HAS_DEBUG
/* The reserved ones only have an R in them, to save a bit of space. */
static const char const *cidc_debug_strings[] =
{
[cidc_gvc] = "Generic verification component", /* 0x0 */
[cidc_romtab] = "ROM Table", /* 0x1 */
[0x2 ... 0x8] = "R", /* 0x2 - 0x8 */
[cidc_dc] = "Debug component", /* 0x9 */
[0xA] = "R", /* 0xA */
[cidc_ptb] = "Peripheral Test Block", /* 0xB */
[0xC] = "R", /* 0xC */
[cidc_dess] = "OptimoDE Data Engine SubSystem component", /* 0xD */
[cidc_gipc] = "Generic IP component", /* 0xE */
[cidc_pcp] = "PrimeCell peripheral", /* 0xF */
[cidc_unknown] = "Unknown component class" /* 0x10 */
};
#endif
#define PIDR0_OFFSET 0xFE0 /* DBGPID0 */
#define PIDR1_OFFSET 0xFE4 /* DBGPID1 */
#define PIDR2_OFFSET 0xFE8 /* DBGPID2 */
#define PIDR3_OFFSET 0xFEC /* DBGPID3 */
#define PIDR4_OFFSET 0xFD0 /* DBGPID4 */
#define PIDR5_OFFSET 0xFD4 /* DBGPID5 (Reserved) */
#define PIDR6_OFFSET 0xFD8 /* DBGPID6 (Reserved) */
#define PIDR7_OFFSET 0xFDC /* DBGPID7 (Reserved) */
#define PIDR_REV_MASK 0x0FFF00000ULL /* Revision bits. */
#define PIDR_PN_MASK 0x000000FFFULL /* Part number bits. */
#define PIDR_ARM_BITS 0x4000BB000ULL /* These make up the ARM JEP-106 code. */
enum arm_arch {
aa_nosupport,
aa_cortexm,
aa_cortexa,
aa_end
};
#ifdef PLATFORM_HAS_DEBUG
#define PIDR_PN_BIT_STRINGS(...) __VA_ARGS__
#else
#define PIDR_PN_BIT_STRINGS(...)
#endif
/* The part number list was adopted from OpenOCD:
* https://sourceforge.net/p/openocd/code/ci/406f4/tree/src/target/arm_adi_v5.c#l932
*
* The product ID register consists of several parts. For a full description
* refer to ARM Debug Interface v5 Architecture Specification. Based on the
* document the pidr is 64 bit long and has the following interpratiation:
* |7 ID7 reg 0|7 ID6 reg 0|7 ID5 reg 0|7 ID4 reg 0|
* |0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0| | | | |1|0|0|0|
* |63 56|55 48|47 40|39 36|35 32|
* \_______________________ ______________________/\___ __/\___ ___/
* V V V
* Reserved, RAZ 4KB |
* count |
* JEP-106
* Continuation Code
*
* |7 ID3 reg 0|7 ID2 reg 0|7 ID1 reg 0|7 ID0 reg 0|
* | | | | | | | | | | | | |1|0|1|1|1|0|1|1| | | | | | | | | | | | |
* |31 28|27 24|23 20|||18 | 12|11 | 0|
* \___ __/\__ ___/\___ __/ |\______ _____/\___________ ___________/
* V V V | V V
* RevAnd | Revision | JEP-106 Part number
* | | ID code
* Customer 19
* modified `- JEP-106 code is used
*
* JEP-106 is a JEDEC standard assigning manufacturer IDs to different
* manufacturers in case of ARM the full code consisting of the JEP-106
* Continuation code followed by the code used bit and the JEP-106 code itself
* results in the code 0x4BB. These are the bits filled in the above bit table.
*
* We left out some of the Part numbers included in OpenOCD, we only include
* the ones that have ARM as the designer.
*/
static const struct {
uint16_t part_number;
enum arm_arch arch;
enum cid_class cidc;
#ifdef PLATFORM_HAS_DEBUG
const char *type;
const char *full;
#endif
} pidr_pn_bits[] = {
{0x000, aa_cortexm, cidc_gipc, PIDR_PN_BIT_STRINGS("Cortex-M3 SCS", "(System Control Space)")},
{0x001, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M3 ITM", "(Instrumentation Trace Module)")},
{0x002, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M3 DWT", "(Data Watchpoint and Trace)")},
{0x003, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M3 FBP", "(Flash Patch and Breakpoint)")},
{0x008, aa_cortexm, cidc_gipc, PIDR_PN_BIT_STRINGS("Cortex-M0 SCS", "(System Control Space)")},
{0x00a, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M0 DWT", "(Data Watchpoint and Trace)")},
{0x00b, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M0 BPU", "(Breakpoint Unit)")},
{0x00c, aa_cortexm, cidc_gipc, PIDR_PN_BIT_STRINGS("Cortex-M4 SCS", "(System Control Space)")},
{0x00d, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight ETM11", "(Embedded Trace)")},
{0x490, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A15 GIC", "(Generic Interrupt Controller)")},
{0x4c7, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M7 PPB", "(Private Peripheral Bus ROM Table)")},
{0x906, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight CTI", "(Cross Trigger)")},
{0x907, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight ETB", "(Trace Buffer)")},
{0x908, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight CSTF", "(Trace Funnel)")},
{0x910, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight ETM9", "(Embedded Trace)")},
{0x912, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight TPIU", "(Trace Port Interface Unit)")},
{0x913, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight ITM", "(Instrumentation Trace Macrocell)")},
{0x914, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight SWO", "(Single Wire Output)")},
{0x917, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight HTM", "(AHB Trace Macrocell)")},
{0x920, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight ETM11", "(Embedded Trace)")},
{0x921, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A8 ETM", "(Embedded Trace)")},
{0x922, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A8 CTI", "(Cross Trigger)")},
{0x923, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M3 TPIU", "(Trace Port Interface Unit)")},
{0x924, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M3 ETM", "(Embedded Trace)")},
{0x925, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M4 ETM", "(Embedded Trace)")},
{0x930, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-R4 ETM", "(Embedded Trace)")},
{0x941, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight TPIU-Lite", "(Trace Port Interface Unit)")},
{0x950, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight Component", "(unidentified Cortex-A9 component)")},
{0x955, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight Component", "(unidentified Cortex-A5 component)")},
{0x95f, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A15 PTM", "(Program Trace Macrocell)")},
{0x961, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight TMC", "(Trace Memory Controller)")},
{0x962, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight STM", "(System Trace Macrocell)")},
{0x9a0, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("CoreSight PMU", "(Performance Monitoring Unit)")},
{0x9a1, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-M4 TPIU", "(Trace Port Interface Unit)")},
{0x9a5, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A5 ETM", "(Embedded Trace)")},
{0x9a7, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A7 PMU", "(Performance Monitor Unit)")},
{0x9af, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A15 PMU", "(Performance Monitor Unit)")},
{0xc05, aa_cortexa, cidc_dc, PIDR_PN_BIT_STRINGS("Cortex-A5 Debug", "(Debug Unit)")},
{0xc07, aa_cortexa, cidc_dc, PIDR_PN_BIT_STRINGS("Cortex-A7 Debug", "(Debug Unit)")},
{0xc08, aa_cortexa, cidc_dc, PIDR_PN_BIT_STRINGS("Cortex-A8 Debug", "(Debug Unit)")},
{0xc09, aa_cortexa, cidc_dc, PIDR_PN_BIT_STRINGS("Cortex-A9 Debug", "(Debug Unit)")},
{0xc0f, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-A15 Debug", "(Debug Unit)")}, /* support? */
{0xc14, aa_nosupport, cidc_unknown, PIDR_PN_BIT_STRINGS("Cortex-R4 Debug", "(Debug Unit)")}, /* support? */
{0xfff, aa_end, cidc_unknown, PIDR_PN_BIT_STRINGS("end", "end")}
};
extern bool cortexa_probe(ADIv5_AP_t *apb, uint32_t debug_base);
void adiv5_dp_ref(ADIv5_DP_t *dp)
{
dp->refcnt++;
}
void adiv5_ap_ref(ADIv5_AP_t *ap)
{
ap->refcnt++;
}
void adiv5_dp_unref(ADIv5_DP_t *dp)
{
if (--(dp->refcnt) == 0)
free(dp);
}
void adiv5_ap_unref(ADIv5_AP_t *ap)
{
if (--(ap->refcnt) == 0) {
adiv5_dp_unref(ap->dp);
free(ap);
}
}
void adiv5_dp_write(ADIv5_DP_t *dp, uint16_t addr, uint32_t value)
{
dp->low_access(dp, ADIV5_LOW_WRITE, addr, value);
}
static uint32_t adiv5_mem_read32(ADIv5_AP_t *ap, uint32_t addr)
{
uint32_t ret;
adiv5_mem_read(ap, &ret, addr, sizeof(ret));
return ret;
}
static void adiv5_component_probe(ADIv5_AP_t *ap, uint32_t addr)
{
addr &= ~3;
uint64_t pidr = 0;
uint32_t cidr = 0;
/* Assemble logical Product ID register value. */
for (int i = 0; i < 4; i++) {
uint32_t x = adiv5_mem_read32(ap, addr + PIDR0_OFFSET + 4*i);
pidr |= (x & 0xff) << (i * 8);
}
{
uint32_t x = adiv5_mem_read32(ap, addr + PIDR4_OFFSET);
pidr |= (uint64_t)x << 32;
}
/* Assemble logical Component ID register value. */
for (int i = 0; i < 4; i++) {
uint32_t x = adiv5_mem_read32(ap, addr + CIDR0_OFFSET + 4*i);
cidr |= ((uint64_t)(x & 0xff)) << (i * 8);
}
/* CIDR preamble sanity check */
if ((cidr & ~CID_CLASS_MASK) != CID_PREAMBLE) {
DEBUG("0x%X: 0x%X <- does not match preamble (0x%X)\n", addr, cidr, CID_PREAMBLE);
return;
}
/* Extract Component ID class nibble */
uint32_t cid_class = (cidr & CID_CLASS_MASK) >> CID_CLASS_SHIFT;
if (cid_class == cidc_romtab) { /* ROM table, probe recursively */
for (int i = 0; i < 256; i++) {
uint32_t entry = adiv5_mem_read32(ap, addr + i*4);
if (entry == 0)
break;
if ((entry & 1) == 0)
continue;
adiv5_component_probe(ap, addr + (entry & ~0xfff));
}
} else {
/* Check if the component was designed by ARM, we currently do not support,
* any components by other designers.
*/
if ((pidr & ~(PIDR_REV_MASK | PIDR_PN_MASK)) != PIDR_ARM_BITS) {
DEBUG("0x%X: 0x%"PRIx64" <- does not match ARM JEP-106\n", addr, pidr);
return;
}
/* Extract part number from the part id register. */
uint16_t part_number = pidr & PIDR_PN_MASK;
/* Find the part number in our part list and run the appropriate probe
* routine if applicable.
*/
int i;
for (i = 0; pidr_pn_bits[i].arch != aa_end; i++) {
if (pidr_pn_bits[i].part_number == part_number) {
DEBUG("0x%X: %s - %s %s\n", addr,
cidc_debug_strings[cid_class],
pidr_pn_bits[i].type,
pidr_pn_bits[i].full);
/* Perform sanity check, if we know what to expect as component ID
* class.
*/
if ((pidr_pn_bits[i].cidc != cidc_unknown) &&
(cid_class != pidr_pn_bits[i].cidc)) {
DEBUG("WARNING: \"%s\" !match expected \"%s\"\n",
cidc_debug_strings[cid_class],
cidc_debug_strings[pidr_pn_bits[i].cidc]);
}
switch (pidr_pn_bits[i].arch) {
case aa_cortexm:
DEBUG("-> cortexm_probe\n");
cortexm_probe(ap);
break;
case aa_cortexa:
DEBUG("-> cortexa_probe\n");
cortexa_probe(ap, addr);
break;
default:
break;
}
break;
}
}
if (pidr_pn_bits[i].arch == aa_end) {
DEBUG("0x%X: %s - Unknown (PIDR = 0x%"PRIx64")\n", addr,
cidc_debug_strings[cid_class], pidr);
}
}
}
ADIv5_AP_t *adiv5_new_ap(ADIv5_DP_t *dp, uint8_t apsel)
{
ADIv5_AP_t *ap, tmpap;
/* Assume valid and try to read IDR */
memset(&tmpap, 0, sizeof(tmpap));
tmpap.dp = dp;
tmpap.apsel = apsel;
tmpap.idr = adiv5_ap_read(&tmpap, ADIV5_AP_IDR);
if(!tmpap.idr) /* IDR Invalid - Should we not continue here? */
return NULL;
/* Check for ARM Mem-AP */
uint16_t mfg = (tmpap.idr >> 17) & 0x3ff;
uint8_t cls = (tmpap.idr >> 13) & 0xf;
uint8_t type = tmpap.idr & 0xf;
if (mfg != 0x23B) /* Ditch if not ARM */
return NULL;
if ((cls != 8) || (type == 0)) /* Ditch if not Mem-AP */
return NULL;
/* It's valid to so create a heap copy */
ap = malloc(sizeof(*ap));
memcpy(ap, &tmpap, sizeof(*ap));
adiv5_dp_ref(dp);
ap->cfg = adiv5_ap_read(ap, ADIV5_AP_CFG);
ap->base = adiv5_ap_read(ap, ADIV5_AP_BASE);
ap->csw = adiv5_ap_read(ap, ADIV5_AP_CSW) &
~(ADIV5_AP_CSW_SIZE_MASK | ADIV5_AP_CSW_ADDRINC_MASK);
if (ap->csw & ADIV5_AP_CSW_TRINPROG) {
gdb_out("AP transaction in progress. Target may not be usable.\n");
ap->csw &= ~ADIV5_AP_CSW_TRINPROG;
}
DEBUG(" AP %3d: IDR=%08X CFG=%08X BASE=%08X CSW=%08X\n",
apsel, ap->idr, ap->cfg, ap->base, ap->csw);
return ap;
}
void adiv5_dp_init(ADIv5_DP_t *dp)
{
uint32_t ctrlstat = 0;
adiv5_dp_ref(dp);
volatile struct exception e;
TRY_CATCH (e, EXCEPTION_TIMEOUT) {
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
}
if (e.type) {
gdb_out("DP not responding! Trying abort sequence...\n");
adiv5_dp_abort(dp, ADIV5_DP_ABORT_DAPABORT);
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
}
/* Write request for system and debug power up */
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,
ctrlstat |= ADIV5_DP_CTRLSTAT_CSYSPWRUPREQ |
ADIV5_DP_CTRLSTAT_CDBGPWRUPREQ);
/* Wait for acknowledge */
while(((ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT)) &
(ADIV5_DP_CTRLSTAT_CSYSPWRUPACK | ADIV5_DP_CTRLSTAT_CDBGPWRUPACK)) !=
(ADIV5_DP_CTRLSTAT_CSYSPWRUPACK | ADIV5_DP_CTRLSTAT_CDBGPWRUPACK));
if(DO_RESET_SEQ) {
/* This AP reset logic is described in ADIv5, but fails to work
* correctly on STM32. CDBGRSTACK is never asserted, and we
* just wait forever.
*/
/* Write request for debug reset */
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,
ctrlstat |= ADIV5_DP_CTRLSTAT_CDBGRSTREQ);
/* Wait for acknowledge */
while(!((ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT)) &
ADIV5_DP_CTRLSTAT_CDBGRSTACK));
/* Write request for debug reset release */
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,
ctrlstat &= ~ADIV5_DP_CTRLSTAT_CDBGRSTREQ);
/* Wait for acknowledge */
while(adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT) &
ADIV5_DP_CTRLSTAT_CDBGRSTACK);
}
/* Probe for APs on this DP */
for(int i = 0; i < 256; i++) {
ADIv5_AP_t *ap = adiv5_new_ap(dp, i);
if (ap == NULL)
continue;
if (ap->base == 0xffffffff) {
/* No debug entries... useless AP */
adiv5_ap_unref(ap);
continue;
}
/* Should probe further here to make sure it's a valid target.
* AP should be unref'd if not valid.
*/
/* The rest sould only be added after checking ROM table */
adiv5_component_probe(ap, ap->base);
}
adiv5_dp_unref(dp);
}
enum align {
ALIGN_BYTE = 0,
ALIGN_HALFWORD = 1,
ALIGN_WORD = 2
};
#define ALIGNOF(x) (((x) & 3) == 0 ? ALIGN_WORD : \
(((x) & 1) == 0 ? ALIGN_HALFWORD : ALIGN_BYTE))
/* Program the CSW and TAR for sequencial access at a given width */
static void ap_mem_access_setup(ADIv5_AP_t *ap, uint32_t addr, enum align align)
{
uint32_t csw = ap->csw | ADIV5_AP_CSW_ADDRINC_SINGLE;
switch (align) {
case ALIGN_BYTE:
csw |= ADIV5_AP_CSW_SIZE_BYTE;
break;
case ALIGN_HALFWORD:
csw |= ADIV5_AP_CSW_SIZE_HALFWORD;
break;
case ALIGN_WORD:
csw |= ADIV5_AP_CSW_SIZE_WORD;
break;
}
adiv5_ap_write(ap, ADIV5_AP_CSW, csw);
adiv5_dp_low_access(ap->dp, ADIV5_LOW_WRITE, ADIV5_AP_TAR, addr);
}
/* Extract read data from data lane based on align and src address */
static void * extract(void *dest, uint32_t src, uint32_t val, enum align align)
{
switch (align) {
case ALIGN_BYTE:
*(uint8_t *)dest = (val >> ((src & 0x3) << 3) & 0xFF);
break;
case ALIGN_HALFWORD:
*(uint16_t *)dest = (val >> ((src & 0x2) << 3) & 0xFFFF);
break;
case ALIGN_WORD:
*(uint32_t *)dest = val;
break;
}
return (uint8_t *)dest + (1 << align);
}
void
adiv5_mem_read(ADIv5_AP_t *ap, void *dest, uint32_t src, size_t len)
{
uint32_t tmp;
uint32_t osrc = src;
enum align align = MIN(ALIGNOF(src), ALIGNOF(len));
if (len == 0)
return;
len >>= align;
ap_mem_access_setup(ap, src, align);
adiv5_dp_low_access(ap->dp, ADIV5_LOW_READ, ADIV5_AP_DRW, 0);
while (--len) {
tmp = adiv5_dp_low_access(ap->dp, ADIV5_LOW_READ, ADIV5_AP_DRW, 0);
dest = extract(dest, src, tmp, align);
src += (1 << align);
/* Check for 10 bit address overflow */
if ((src ^ osrc) & 0xfffffc00) {
osrc = src;
adiv5_dp_low_access(ap->dp,
ADIV5_LOW_WRITE, ADIV5_AP_TAR, src);
adiv5_dp_low_access(ap->dp,
ADIV5_LOW_READ, ADIV5_AP_DRW, 0);
}
}
tmp = adiv5_dp_low_access(ap->dp, ADIV5_LOW_READ, ADIV5_DP_RDBUFF, 0);
extract(dest, src, tmp, align);
}
void
adiv5_mem_write(ADIv5_AP_t *ap, uint32_t dest, const void *src, size_t len)
{
uint32_t odest = dest;
enum align align = MIN(ALIGNOF(dest), ALIGNOF(len));
len >>= align;
ap_mem_access_setup(ap, dest, align);
while (len--) {
uint32_t tmp = 0;
/* Pack data into correct data lane */
switch (align) {
case ALIGN_BYTE:
tmp = ((uint32_t)*(uint8_t *)src) << ((dest & 3) << 3);
break;
case ALIGN_HALFWORD:
tmp = ((uint32_t)*(uint16_t *)src) << ((dest & 2) << 3);
break;
case ALIGN_WORD:
tmp = *(uint32_t *)src;
break;
}
src = (uint8_t *)src + (1 << align);
dest += (1 << align);
adiv5_dp_low_access(ap->dp, ADIV5_LOW_WRITE, ADIV5_AP_DRW, tmp);
/* Check for 10 bit address overflow */
if ((dest ^ odest) & 0xfffffc00) {
odest = dest;
adiv5_dp_low_access(ap->dp,
ADIV5_LOW_WRITE, ADIV5_AP_TAR, dest);
}
}
}
void adiv5_ap_write(ADIv5_AP_t *ap, uint16_t addr, uint32_t value)
{
adiv5_dp_write(ap->dp, ADIV5_DP_SELECT,
((uint32_t)ap->apsel << 24)|(addr & 0xF0));
adiv5_dp_write(ap->dp, addr, value);
}
uint32_t adiv5_ap_read(ADIv5_AP_t *ap, uint16_t addr)
{
uint32_t ret;
adiv5_dp_write(ap->dp, ADIV5_DP_SELECT,
((uint32_t)ap->apsel << 24)|(addr & 0xF0));
ret = adiv5_dp_read(ap->dp, addr);
return ret;
}
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