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mbedTLS: Add ESP8266 hardware entropy source discovered by @foogod

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Addresses #3, provided turns out to be an effective HWRNG.
This commit is contained in:
Angus Gratton 2015-09-18 15:12:09 +10:00
parent 1b22cc088e
commit b03f279f74
3 changed files with 76 additions and 3 deletions
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44
core/include/esp/wdev_regs.h Normal file
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@ -0,0 +1,44 @@
/* esp/dport_regs.h
*
* ESP8266 WDEV register definitions
*
* In the DPORT memory space, alongside DPORT regs. However mostly
* concerned with the WiFi hardware interface.
*
* Not well understood at all, 100% figured out via reverse engineering.
*/
#ifndef _ESP_WDEV__REGS_H
#define _ESP_WDEV__REGS_H
#include "esp/types.h"
#include "common_macros.h"
#define WDEV_BASE 0x3ff20e00
#define WDEV (*(struct WDEV_REGS *)(WDEV_BASE))
/* WDEV registers
*/
struct WDEV_REGS {
uint32_t volatile _unknown00; // 0x00
uint32_t volatile _unknown04; // 0x04
uint32_t volatile _unknown08; // 0x08
uint32_t volatile _unknown0c; // 0x0c
uint32_t volatile _unknown10; // 0x10
uint32_t volatile _unknown14; // 0x14
uint32_t volatile _unknown18; // 0x18
uint32_t volatile _unknown1c; // 0x1c
uint32_t volatile _unknown20; // 0x20
uint32_t volatile _unknown24; // 0x24
uint32_t volatile _unknown28; // 0x28
uint32_t volatile _unknown2c; // 0x2c
uint32_t volatile _unknown30; // 0x30
uint32_t volatile _unknown34; // 0x34
uint32_t volatile _unknown38; // 0x38
uint32_t volatile _unknown3c; // 0x3c
uint32_t volatile _unknown40; // 0x40
uint32_t volatile HWRNG; // 0x44 Appears to be HW RNG, see https://github.com/SuperHouse/esp-open-rtos/issues/3#issuecomment-139453094
};
#endif