Fix for Erratum 350 for AMD Fam10h CPUs.
Compared to posted patch, there are whitespace fixes (request by Uwe), and a guard to run the erratum only on AMD_RB_C2 (request by Marc). Signed-off-by: Marco Schmidt <mashpb@gmail.com> Acked-by: Patrick Georgi <patrick.georgi@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4346 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
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@ -356,7 +356,7 @@ static void DQSTiming_D(struct MCTStatStruc *pMCTstat,
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phyAssistedMemFnceTraining(pMCTstat, pDCTstatA);
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if (nv_DQSTrainCTL) {
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mctHookBeforeAnyTraining();
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mctHookBeforeAnyTraining(pMCTstat, pDCTstatA);
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print_t("DQSTiming_D: TrainReceiverEn_D FirstPass:\n");
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TrainReceiverEn_D(pMCTstat, pDCTstatA, FirstPass);
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@ -18,7 +18,7 @@
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*/
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/* Call-backs */
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#include <delay.h>
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u16 mctGet_NVbits(u8 index)
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{
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u16 val = 0;
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@ -326,9 +326,77 @@ void mctHookAfterDramInit(void)
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{
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}
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static void coreDelay (void);
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void mctHookBeforeAnyTraining(void)
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/* Erratum 350 */
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void vErrata350(struct MCTStatStruc *pMCTstat, struct DCTStatStruc *pDCTstat)
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{
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u8 u8Channel;
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u8 u8Receiver;
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u32 u32Addr;
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u8 u8Valid;
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u32 u32DctDev;
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// 1. dummy read for each installed DIMM */
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for (u8Channel = 0; u8Channel < 2; u8Channel++) {
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// This will be 0 for vaild DIMMS, eles 8
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u8Receiver = mct_InitReceiver_D(pDCTstat, u8Channel);
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for (; u8Receiver < 8; u8Receiver += 2) {
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u32Addr = mct_GetRcvrSysAddr_D(pMCTstat, pDCTstat, u8Channel, u8Receiver, &u8Valid);
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if(!u8Valid) { /* Address not supported on current CS */
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print_t("vErrara350: Address not supported on current CS\n");
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continue;
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}
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print_t("vErrara350: dummy read \n");
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read32_fs(u32Addr);
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}
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}
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print_t("vErrara350: step 2a\n");
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/* 2. Write 0000_8000h to register F2x[1, 0]9C_xD080F0C. */
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u32DctDev = pDCTstat->dev_dct;
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Set_NB32_index_wait(u32DctDev, 0x098, 0x0c, 0x00008000);
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/* ^--- value
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^---F2x[1, 0]9C_x0C DRAM Phy Miscellaneous Register
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^----F2x[1, 0]98 DRAM Controller Additional Data Offset Register */
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if(!pDCTstat->GangedMode) {
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print_t("vErrara350: step 2b\n");
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Set_NB32_index_wait(u32DctDev, 0x198, 0x0c, 0x00008000);
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/* ^--- value
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^---F2x[1, 0]9C_x0C DRAM Phy Miscellaneous Register
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^----F2x[1, 0]98 DRAM Controller Additional Data Offset Register */
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}
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print_t("vErrara350: step 3\n");
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/* 3. Wait at least 300 nanoseconds. */
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coreDelay();
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print_t("vErrara350: step 4\n");
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/* 4. Write 0000_0000h to register F2x[1, 0]9C_xD080F0C. */
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Set_NB32_index_wait(u32DctDev, 0x098, 0x0c, 0x00000000);
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if(!pDCTstat->GangedMode) {
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print_t("vErrara350: step 4b\n");
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Set_NB32_index_wait(u32DctDev, 0x198, 0x0c, 0x00000000);
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}
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print_t("vErrara350: step 5\n");
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/* 5. Wait at least 2 microseconds. */
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coreDelay();
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}
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void mctHookBeforeAnyTraining(struct MCTStatStruc *pMCTstat, struct DCTStatStruc *pDCTstatA)
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{
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if (pDCTstatA->LogicalCPUID & AMD_RB_C2) {
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vErrata350(pMCTstat, pDCTstatA);
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}
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}
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void mctHookAfterAnyTraining(void)
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