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-rw-r--r--register.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/register.c b/register.c
new file mode 100644
index 0000000..cb6bd88
--- /dev/null
+++ b/register.c
@@ -0,0 +1,280 @@
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "pci.h"
+
+#include "tools.h"
+#include "error.h"
+
+pcilib_register_bank_t pcilib_find_bank_by_addr(pcilib_t *ctx, pcilib_register_bank_addr_t bank) {
+ pcilib_register_bank_t i;
+ pcilib_model_t model = pcilib_get_model(ctx);
+ pcilib_register_bank_description_t *banks = pcilib_model[model].banks;
+
+ for (i = 0; banks[i].access; i++)
+ if (banks[i].addr == bank) return i;
+
+ return -1;
+}
+
+pcilib_register_bank_t pcilib_find_bank_by_name(pcilib_t *ctx, const char *bankname) {
+ pcilib_register_bank_t i;
+ pcilib_register_bank_description_t *banks = pcilib_model[ctx->model].banks;
+
+ for (i = 0; banks[i].access; i++)
+ if (!strcasecmp(banks[i].name, bankname)) return i;
+
+ return -1;
+}
+
+pcilib_register_bank_t pcilib_find_bank(pcilib_t *ctx, const char *bank) {
+ pcilib_register_bank_t res;
+ unsigned long addr;
+
+ if (!bank) {
+ pcilib_model_t model = pcilib_get_model(ctx);
+ pcilib_register_bank_description_t *banks = pcilib_model[model].banks;
+ if ((banks)&&(banks[0].access)) return (pcilib_register_bank_t)0;
+ return -1;
+ }
+
+ if (pcilib_isxnumber(bank)&&(sscanf(bank,"%lx", &addr) == 1)) {
+ res = pcilib_find_bank_by_addr(ctx, addr);
+ if (res != PCILIB_REGISTER_BANK_INVALID) return res;
+ }
+
+ return pcilib_find_bank_by_name(ctx, bank);
+}
+
+ // FIXME create hash during map_register space
+pcilib_register_t pcilib_find_register(pcilib_t *ctx, const char *bank, const char *reg) {
+ pcilib_register_t i;
+ pcilib_register_bank_t bank_id;
+ pcilib_register_bank_addr_t bank_addr;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ pcilib_register_description_t *registers = pcilib_model[model].registers;
+
+ if (bank) {
+ bank_id = pcilib_find_bank(ctx, bank);
+ if (bank_id == PCILIB_REGISTER_BANK_INVALID) {
+ pcilib_error("Invalid bank (%s) is specified", bank);
+ return -1;
+ }
+
+ bank_addr = pcilib_model[model].banks[bank_id].addr;
+ }
+
+ for (i = 0; registers[i].bits; i++) {
+ if ((!strcasecmp(registers[i].name, reg))&&((!bank)||(registers[i].bank == bank_addr))) return i;
+ }
+
+ return (pcilib_register_t)-1;
+};
+
+static int pcilib_read_register_space_internal(pcilib_t *ctx, pcilib_register_bank_t bank, pcilib_register_addr_t addr, size_t n, uint8_t bits, pcilib_register_value_t *buf) {
+ int err;
+ int rest;
+ size_t i;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+ pcilib_register_bank_description_t *b = pcilib_model[model].banks + bank;
+
+ assert(bits < 8 * sizeof(pcilib_register_value_t));
+
+ if (((addr + n) > b->size)||(((addr + n) == b->size)&&(bits))) {
+ pcilib_error("Accessing sregister (%u regs at addr %u) out of register space (%u registers total)", bits?(n+1):n, addr, b->size);
+ return PCILIB_ERROR_OUTOFRANGE;
+ }
+
+ err = pcilib_map_register_space(ctx);
+ if (err) {
+ pcilib_error("Failed to map the register space");
+ return err;
+ }
+
+ //n += bits / b->access;
+ //bits %= b->access;
+
+ for (i = 0; i < n; i++) {
+ err = pcilib_protocol[b->protocol].read(ctx, b, addr + i, b->access, buf + i);
+ if (err) break;
+ }
+
+ if ((bits > 0)&&(!err)) err = pcilib_protocol[b->protocol].read(ctx, b, addr + n, bits, buf + n);
+
+ return err;
+}
+
+int pcilib_read_register_space(pcilib_t *ctx, const char *bank, pcilib_register_addr_t addr, size_t n, pcilib_register_value_t *buf) {
+ pcilib_register_bank_t bank_id = pcilib_find_bank(ctx, bank);
+ if (bank_id == PCILIB_REGISTER_BANK_INVALID) {
+ if (bank) pcilib_error("Invalid register bank is specified (%s)", bank);
+ else pcilib_error("Register bank should be specified");
+ return PCILIB_ERROR_INVALID_BANK;
+ }
+
+ return pcilib_read_register_space_internal(ctx, bank_id, addr, n, 0, buf);
+}
+
+int pcilib_read_register_by_id(pcilib_t *ctx, pcilib_register_t reg, pcilib_register_value_t *value) {
+ int err;
+ size_t i, n, bits;
+ pcilib_register_value_t res;
+ pcilib_register_description_t *r;
+ pcilib_register_bank_description_t *b;
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ r = pcilib_model[model].registers + reg;
+ b = pcilib_model[model].banks + r->bank;
+
+ n = r->bits / b->access;
+ bits = r->bits % b->access;
+
+ pcilib_register_value_t buf[n + 1];
+ err = pcilib_read_register_space_internal(ctx, r->bank, r->addr, n, bits, buf);
+
+ if ((b->endianess == PCILIB_BIG_ENDIAN)||((b->endianess == PCILIB_HOST_ENDIAN)&&(ntohs(1) == 1))) {
+ pcilib_error("Big-endian byte order support is not implemented");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ } else {
+ res = 0;
+ if (bits) ++n;
+ for (i = 0; i < n; i++) {
+ res |= buf[i] << (i * b->access);
+ }
+ }
+
+ *value = res;
+
+ return err;
+}
+
+
+int pcilib_read_register(pcilib_t *ctx, const char *bank, const char *regname, pcilib_register_value_t *value) {
+ int err;
+ int reg;
+
+ reg = pcilib_find_register(ctx, bank, regname);
+ if (reg < 0) {
+ pcilib_error("Register (%s) is not found", regname);
+ return PCILIB_ERROR_NOTFOUND;
+ }
+
+ return pcilib_read_register_by_id(ctx, reg, value);
+
+// registers[reg].bank
+// printf("%li %li", sizeof(pcilib_model[model].banks), sizeof(pcilib_register_bank_description_t));
+}
+
+
+static int pcilib_write_register_space_internal(pcilib_t *ctx, pcilib_register_bank_t bank, pcilib_register_addr_t addr, size_t n, uint8_t bits, pcilib_register_value_t *buf) {
+ int err;
+ int rest;
+ size_t i;
+
+ pcilib_model_t model = pcilib_get_model(ctx);
+ pcilib_register_bank_description_t *b = pcilib_model[model].banks + bank;
+
+ assert(bits < 8 * sizeof(pcilib_register_value_t));
+
+ if (((addr + n) > b->size)||(((addr + n) == b->size)&&(bits))) {
+ pcilib_error("Accessing sregister (%u regs at addr %u) out of register space (%u registers total)", bits?(n+1):n, addr, b->size);
+ return PCILIB_ERROR_OUTOFRANGE;
+ }
+
+ err = pcilib_map_register_space(ctx);
+ if (err) {
+ pcilib_error("Failed to map the register space");
+ return err;
+ }
+
+ //n += bits / b->access;
+ //bits %= b->access;
+
+ for (i = 0; i < n; i++) {
+ err = pcilib_protocol[b->protocol].write(ctx, b, addr + i, b->access, buf[i]);
+ if (err) break;
+ }
+
+ if ((bits > 0)&&(!err)) err = pcilib_protocol[b->protocol].write(ctx, b, addr + n, bits, buf[n]);
+
+ return err;
+}
+
+int pcilib_write_register_space(pcilib_t *ctx, const char *bank, pcilib_register_addr_t addr, size_t n, pcilib_register_value_t *buf) {
+ pcilib_register_bank_t bank_id = pcilib_find_bank(ctx, bank);
+ if (bank_id == PCILIB_REGISTER_BANK_INVALID) {
+ if (bank) pcilib_error("Invalid register bank is specified (%s)", bank);
+ else pcilib_error("Register bank should be specified");
+ return PCILIB_ERROR_INVALID_BANK;
+ }
+
+ return pcilib_write_register_space_internal(ctx, bank_id, addr, n, 0, buf);
+}
+
+
+int pcilib_write_register_by_id(pcilib_t *ctx, pcilib_register_t reg, pcilib_register_value_t value) {
+ int err;
+ size_t i, n, bits;
+ pcilib_register_value_t res;
+ pcilib_register_description_t *r;
+ pcilib_register_bank_description_t *b;
+ pcilib_model_t model = pcilib_get_model(ctx);
+
+ r = pcilib_model[model].registers + reg;
+ b = pcilib_model[model].banks + r->bank;
+
+ n = r->bits / b->access;
+ bits = r->bits % b->access;
+
+ pcilib_register_value_t buf[n + 1];
+ memset(buf, 0, (n + 1) * sizeof(pcilib_register_value_t));
+
+ if ((b->endianess == PCILIB_BIG_ENDIAN)||((b->endianess == PCILIB_HOST_ENDIAN)&&(ntohs(1) == 1))) {
+ pcilib_error("Big-endian byte order support is not implemented");
+ return PCILIB_ERROR_NOTSUPPORTED;
+ } else {
+ if (b->access == sizeof(pcilib_register_value_t) * 8) {
+ buf[0] = value;
+ } else {
+ for (i = 0, res = value; (res > 0)&&(i <= n); ++i) {
+ buf[i] = res & BIT_MASK(b->access);
+ res >>= b->access;
+ }
+
+ if (res) {
+ pcilib_error("Value %i is too big to fit in the register %s", value, r->name);
+ return PCILIB_ERROR_OUTOFRANGE;
+ }
+ }
+ }
+
+ err = pcilib_write_register_space_internal(ctx, r->bank, r->addr, n, bits, buf);
+ return err;
+}
+
+int pcilib_write_register(pcilib_t *ctx, const char *bank, const char *regname, pcilib_register_value_t value) {
+ int err;
+ int reg;
+
+ reg = pcilib_find_register(ctx, bank, regname);
+ if (reg < 0) {
+ pcilib_error("Register (%s) is not found", regname);
+ return PCILIB_ERROR_NOTFOUND;
+ }
+
+ return pcilib_write_register_by_id(ctx, reg, value);
+}
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