1 files changed, 90 insertions, 0 deletions
diff --git a/protocols/software_registers.c b/protocols/software_registers.c
new file mode 100644
index 0000000..d3c390f
--- /dev/null
+++ b/protocols/software_registers.c
@@ -0,0 +1,90 @@
+#include <string.h>
+#include <sys/file.h>
+#include <unistd.h>
+
+#include "model.h"
+#include "error.h"
+#include "kmem.h"
+#include "pcilib.h"
+#include "pci.h"
+
+
+/**
+ * pcilib_software_registers_open
+ * this function initializes the kernel space memory and stores in it the default values of the registers of the given bank index, if it was not initialized by a concurrent process, and return a bank context containing the adress of this kernel space. It the kernel space memory was already initialized by a concurrent process, then this function just return the bank context with the adress of this kernel space already used
+ *@param[in] ctx the pcilib_t structure running
+ * @param[in] bank the bank index that will permits to get the bank we want registers from
+ * @param[in] model not used
+ * @param[in] args not used
+ *@return a bank context with the adress of the kernel space memory related to it
+ */
+pcilib_register_bank_context_t* pcilib_software_registers_open(pcilib_t *ctx, pcilib_register_bank_t bank,const char* model, const void *args){
+	pcilib_register_bank_context_t* bank_ctx;
+	pcilib_register_value_t *init=NULL;
+	pcilib_kmem_handle_t *test;
+	int i;
+	int j;
+	
+	bank_ctx=calloc(1,sizeof(pcilib_register_bank_context_t));
+	bank_ctx->bank=ctx->banks + bank;
+	
+	test=pcilib_alloc_kernel_memory(ctx, 0, 0, 0, 0,PCILIB_KMEM_USE_STANDARD,PCILIB_KMEM_FLAG_REUSE|PCILIB_KMEM_FLAG_PERSISTENT);
+	if (!test)pcilib_error("allocation of kernel memory for registers has failed");
+
+	if(pcilib_kmem_is_reused(ctx,test)== PCILIB_KMEM_REUSE_ALLOCATED){
+		bank_ctx->bank_software_register_adress=test;
+	}else{
+		bank_ctx->bank_software_register_adress=test;
+		init=test;		
+		j=0;
+		while(ctx->model_info.registers[j].name!=NULL){
+		  if(ctx->model_info.registers[j].bank==(ctx->banks + bank).addr){
+		    pcilib_write_register_by_id(ctx,ctx->model_info.registers[j],ctx->model_info.registers[j].defvalue);
+			}	
+			j++;
+		}		
+	}
+	return bank_ctx;
+}
+
+
+/**
+ * pcilib_software_registers_close
+ * this function clear the kernel memory space that could have been allocated for software registers
+ * @param[in] bank_ctx the bank context running that we get from the initialisation function
+ */	
+void pcilib_software_registers_close(pcilib_register_bank_context_t *bank_ctx){
+	int err=1;
+
+	err=pcilib_clean_kernel_memory(bank_ctx->ctx, 0, 0);
+	
+	if(err) pcilib_error("Error closing register kernel space");
+}
+
+/**
+ * pcilib_software_registers_read
+ * this function read the value of a said register in the kernel space
+ * @param[in] ctx the pcilib_t structure runnning
+ * @param[in] bank_ctx the bank context that was returned by the initialisation function
+ * @param[in] addr the adress of the register we want to read
+ *@param[out] value the value of the register
+ * @return 0 in case of success
+ */
+int pcilib_software_registers_read(pcilib_t *ctx, pcilib_register_bank_context_t *bank_ctx,pcilib_register_addr_t addr, pcilib_register_value_t *value){
+  *value= *(pcilib_register_value_t*) bank_ctx->bank_software_register_adress+addr;
+	return 0;
+}
+
+/**
+ * pcilib_software_registers_write
+ * this function write the said value to a said register in the kernel space
+ * @param[in] ctx the pcilib_t structure runnning
+ * @param[in] bank_ctx the bank context that was returned by the initialisation function
+ * @param[in] addr the adress of the register we want to write in
+ *@param[out] value the value we want to write in the register
+ * @return 0 in case of success
+ */
+int pcilib_software_registers_write(pcilib_t *ctx, pcilib_register_bank_context_t *bank_ctx, pcilib_register_addr_t addr, pcilib_register_value_t value){
+	*(pcilib_register_value_t*)(bank_ctx->bank_software_register_adress+addr)=value;
+	return 0;
+}