diff options
Diffstat (limited to 'Documentation/northbridge')
4 files changed, 15 insertions, 14 deletions
diff --git a/Documentation/northbridge/intel/sandybridge/nri.md b/Documentation/northbridge/intel/sandybridge/nri.md index 1b07ba48eb..812cd23fdb 100644 --- a/Documentation/northbridge/intel/sandybridge/nri.md +++ b/Documentation/northbridge/intel/sandybridge/nri.md @@ -3,7 +3,7 @@ ## Introduction This documentation is intended to document the closed source memory controller -hardware for Intel 2nd Gen (Sandy Bride) and 3rd Gen (Ivy Bridge) core-i CPUs. +hardware for Intel 2nd Gen (Sandy Bridge) and 3rd Gen (Ivy Bridge) core-i CPUs. The memory initialization code has to take care of lots of duties: 1. Selection of operating frequency @@ -41,13 +41,13 @@ The memory initialization code has to take care of lots of duties: ``` ## (Inoffical) register documentation -- [Sandy Bride - Register documentation](nri_registers.md) +- [Sandy Bridge - Register documentation](nri_registers.md) ## Frequency selection -- [Sandy Bride - Frequency selection](nri_freq.md) +- [Sandy Bridge - Frequency selection](nri_freq.md) ## Read training -- [Sandy Bride - Read training](nri_read.md) +- [Sandy Bridge - Read training](nri_read.md) ### SMBIOS type 17 The SMBIOS specification allows to report the memory configuration in use. @@ -113,7 +113,7 @@ than a board that doesn't boot at all. > **Note:** This feature is available since coreboot 4.5 Try to swap memory modules and or try to use a different vendor. If nothing -helps you could have a look at capter [Debuggin] or report a ticket +helps you could have a look at chapter [Debugging] or report a ticket at [ticket.coreboot.org]. Please provide a full RAM init log, that has been captured using EHCI debug. diff --git a/Documentation/northbridge/intel/sandybridge/nri_freq.md b/Documentation/northbridge/intel/sandybridge/nri_freq.md index d8b73b3aec..208c1cb13c 100644 --- a/Documentation/northbridge/intel/sandybridge/nri_freq.md +++ b/Documentation/northbridge/intel/sandybridge/nri_freq.md @@ -1,7 +1,8 @@ # Frequency selection ## Introduction -This chapter explains the frequency selection done on Sandybride and Ivybridge. +This chapter explains the frequency selection done on Sandy Bridge and Ivy +Bridge memory initialization. ## Definitions ```eval_rst @@ -58,7 +59,7 @@ and thus are called "soft" fuses, as it is possible to ignore them. > **Note:** Ignoring the fuses might cause system instability ! -On Sandy Bride *CAPID0_A* is being read, and on Ivybridge *CAPID0_B* is being +On Sandy Bridge *CAPID0_A* is being read, and on Ivy Bridge *CAPID0_B* is being read. coreboot reads those registers and honors the limit in case the Kconfig option `CONFIG_NATIVE_RAMINIT_IGNORE_MAX_MEM_FUSES` wasn't set. Power users that want to let their RAM run at DRAM's "stock" frequency need to @@ -84,7 +85,7 @@ by the board manufacturer. By using this register it's possible to force a minimum operating frequency. ## Reference clock -While Sandybride supports 133 MHz reference clock (REFCK), Ivy Bridge also +While Sandy Bridge supports 133 MHz reference clock (REFCK), Ivy Bridge also supports 100 MHz reference clock. The reference clock is multiplied by the DRAM multiplier to select the DRAM frequency (SCK) by the following formula: @@ -92,7 +93,7 @@ multiplier to select the DRAM frequency (SCK) by the following formula: > **Note:** Since coreboot 4.6 Ivy Bridge supports 100MHz REFCK. -## Sandy Bride's supported frequencies +## Sandy Bridge's supported frequencies ```eval_rst +------------+-----------+------------------+-------------------------+---------------+ | SCK [Mhz] | DDR [Mhz] | Mutiplier (MULT) | Reference clock (REFCK) | Comment | @@ -111,7 +112,7 @@ multiplier to select the DRAM frequency (SCK) by the following formula: +------------+-----------+------------------+-------------------------+---------------+ ``` -## Ivybridge's supported frequencies +## Ivy Bridge's supported frequencies ```eval_rst +------------+-----------+------------------+-------------------------+---------------+ | SCK [Mhz] | DDR [Mhz] | Mutiplier (MULT) | Reference clock (REFCK) | Comment | @@ -144,7 +145,7 @@ multiplier to select the DRAM frequency (SCK) by the following formula: > '1: since coreboot 4.6 ## Multiplier selection -coreboot select the maximum frequency to operate at by the following formula: +coreboot selects the maximum frequency to operate at by the following formula: ``` if devicetree's max_mem_clock_mhz > 0: freq_max := max_mem_clock_mhz diff --git a/Documentation/northbridge/intel/sandybridge/nri_read.md b/Documentation/northbridge/intel/sandybridge/nri_read.md index 0496657b3f..f5c79acdf6 100644 --- a/Documentation/northbridge/intel/sandybridge/nri_read.md +++ b/Documentation/northbridge/intel/sandybridge/nri_read.md @@ -2,7 +2,7 @@ ## Introduction -This chapter explains the read training sequence done on Sandy Bride and +This chapter explains the read training sequence done on Sandy Bridge and Ivy Bridge memory initialization. Read training is done to compensate the skew between DQS and SCK and to find diff --git a/Documentation/northbridge/intel/sandybridge/nri_registers.md b/Documentation/northbridge/intel/sandybridge/nri_registers.md index 601157c464..6249560a6f 100644 --- a/Documentation/northbridge/intel/sandybridge/nri_registers.md +++ b/Documentation/northbridge/intel/sandybridge/nri_registers.md @@ -1556,7 +1556,7 @@ Please handle with care ! *Width:* 16 Bit -*Desc:* OTHP Workaround (SandyBridge only) Register, Channel 0 +*Desc:* OTHP Workaround (Sandy Bridge only) Register, Channel 0 ```eval_rst +-----------+------------------------------------------------------------------+ @@ -2138,7 +2138,7 @@ Please handle with care ! | 0:7| Selected multiplier: 100Mhz [7,12], 133Mhz [3,19] | +-----------+------------------------------------------------------------------+ | 8 | - 1: 100Mhz reference clock | -| | - 0: 133Mhz reference clock (IvyBridge only) | +| | - 0: 133Mhz reference clock (Ivy Bridge only) | +-----------+------------------------------------------------------------------+ | 31 | PLL busy | +-----------+------------------------------------------------------------------+ |