caam: Fixes RNG descriptors

Moves CAAM initialization and RNG related job descriptors to
a non-cacheable region instead of being on the write-back stack.
Currently the CAAM and cores are accessing these descriptors incoherently.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

mcux/mcux-sdk-ng/README

@@ -0,0 +1,44 @@
+MCUXpresso SDK NG
+##############
+
+Origin:
+   NXP MCUXpresso SDK Core
+   https://github.com/nxp-mcuxpresso/mcuxsdk-core
+   SHA: 84547d55114471cd361e32559db1c4ecb3a32815
+
+   NXP MCUXpresso SDK Component
+   https://github.com/nxp-mcuxpresso/mcux-component
+   SHA: 0a95c0536c168a97e1caac0bc41898c3cf9f75a8
+
+   NXP MCUXpresso SDK Device i.MX
+   https://github.com/nxp-mcuxpresso/mcux-devices-imx
+   SHA: bd9dec893950a163c5f9f4c53e5bc7a202b83819
+
+   NXP MCUXpresso SDK Device RT
+   https://github.com/nxp-mcuxpresso/mcux-devices-rt
+   SHA: 69599d3038bf20fdffb5b89dc3fcb34a2322f43a
+
+   NXP MCUXpresso SDK Device Kinetis
+   https://github.com/nxp-mcuxpresso/mcux-devices-kinetis
+   SHA: d3b2cbe46095f59a27d7f0d8b251bcfa7a8f5d6f
+
+   NXP MCUXpresso SDK Device LPC
+   https://github.com/nxp-mcuxpresso/mcux-devices-lpc
+   SHA: 4671b7f19480417fefb23eb8c6e71a2bc9f2d9f1
+
+   NXP MCUXpresso SDK Device MCX
+   https://github.com/nxp-mcuxpresso/mcux-devices-mcx
+   SHA: 3ff51c8cf729c59918e96f4ce33b37c3e93ffc74
+
+   NXP MCUXpresso SDK Device Wireless
+   https://github.com/nxp-mcuxpresso/mcux-devices-wireless
+   SHA: 0dbc39ab4a247d7edc1b2b9aecdf3f0ea33369af
+
+   NXP MCUXpresso SDK USB
+   https://github.com/nxp-mcuxpresso/mcuxsdk-middleware-usb
+   SHA: ff4c277499155029637526e0bf7ad7fa4c875e48
+
+
+Patch List:
+  - drivers/caam/fsl_caam.c: Move used job descriptors in the CAAM driver from the stack to noncacheable section. At time of writing, there should
+     be four being used for entropy in zephyr.

mcux/mcux-sdk-ng/drivers/caam/fsl_caam.c

@@ -221,6 +221,10 @@ static uint32_t s_jrIndex2              = 0;    /*!< Current index in the input
 static caam_job_ring_interface_t *s_jr3 = NULL; /*!< Pointer to job ring interface 3. */
 static uint32_t s_jrIndex3              = 0;    /*!< Current index in the input job ring 3. */
 
+AT_NONCACHEABLE_SECTION(static caam_rng_config_t rngConfig);
+AT_NONCACHEABLE_SECTION(static caam_desc_rng_t rngGenSeckey);
+AT_NONCACHEABLE_SECTION(static caam_desc_rng_t rngInstantiate);
+AT_NONCACHEABLE_SECTION(static caam_desc_rng_t descBuf);
 /*******************************************************************************
  * Code
  ******************************************************************************/
@@ -1842,7 +1846,6 @@ status_t CAAM_Init(CAAM_Type *base, const caam_config_t *config)
      * for FIFO STORE command to be able to store Key register as Black key
      * for example during AES XCBC-MAC context switch (need to store derived key K1 to memory)
      */
-    caam_rng_config_t rngConfig;
     (void)CAAM_RNG_GetDefaultConfig(&rngConfig);
 
     /* reset RNG */
@@ -4444,7 +4447,6 @@ status_t CAAM_RNG_Init(CAAM_Type *base,
     status_t status;
 
     /* create job descriptor */
-    caam_desc_rng_t rngInstantiate = {0};
     rngInstantiate[0]              = 0xB0800006u;
     rngInstantiate[1]              = 0x12200020u; /* LOAD 32 bytes of  to Class 1 Context Register. Offset 0 bytes. */
     rngInstantiate[2]              = (uint32_t)ADD_OFFSET((uint32_t)config->personalString);
@@ -4540,7 +4542,6 @@ status_t CAAM_RNG_GenerateSecureKey(CAAM_Type *base, caam_handle_t *handle, caam
     status_t status;
 
     /* create job descriptor */
-    caam_desc_rng_t rngGenSeckey = {0};
     rngGenSeckey[0]              = 0xB0800004u; /* HEADER */
     rngGenSeckey[1]              = 0x12200020u; /* LOAD 32 bytes of  to Class 1 Context Register. Offset 0 bytes. */
     rngGenSeckey[2]              = ADD_OFFSET((uint32_t)additionalEntropy);
@@ -4647,7 +4648,6 @@ status_t CAAM_RNG_GetRandomData(CAAM_Type *base,
                                 caam_rng_generic256_t additionalEntropy)
 {
     status_t status;
-    caam_desc_rng_t descBuf;
 
     do
     {