diff options
| author | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-07-19 17:37:07 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-07-19 17:37:07 +0000 |
| commit | 1ea5ca46c7eefe66a01cb4db3b72fc0e5a04e2cb (patch) | |
| tree | 11db61e6d73e5a6b0bca974e7e4a8e29f1344a49 /MdePkg/Library/BaseLib/X64/Non-existing.c | |
| parent | ebfe209ec07c4105baba33576457a4bd6c798a2b (diff) | |
| download | edk2-platforms-1ea5ca46c7eefe66a01cb4db3b72fc0e5a04e2cb.tar.xz | |
1. added functions header for BaseUefiDecompressLi
2. added some internal functions header for BaseLib
3. added EFIAPI for some internal assembly files declare
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1050 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/Non-existing.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/Non-existing.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/X64/Non-existing.c b/MdePkg/Library/BaseLib/X64/Non-existing.c index fc4fd43898..a1c4677dad 100644 --- a/MdePkg/Library/BaseLib/X64/Non-existing.c +++ b/MdePkg/Library/BaseLib/X64/Non-existing.c @@ -16,6 +16,39 @@ #include "../BaseLibInternals.h"
+/**
+ Enables the 32-bit paging mode on the CPU.
+
+ Enables the 32-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables
+ must be properly initialized prior to calling this service. This function
+ assumes the current execution mode is 32-bit protected mode. This function is
+ only available on IA-32. After the 32-bit paging mode is enabled, control is
+ transferred to the function specified by EntryPoint using the new stack
+ specified by NewStack and passing in the parameters specified by Context1 and
+ Context2. Context1 and Context2 are optional and may be NULL. The function
+ EntryPoint must never return.
+
+ There are a number of constraints that must be followed before calling this
+ function:
+ 1) Interrupts must be disabled.
+ 2) The caller must be in 32-bit protected mode with flat descriptors. This
+ means all descriptors must have a base of 0 and a limit of 4GB.
+ 3) CR0 and CR4 must be compatible with 32-bit protected mode with flat
+ descriptors.
+ 4) CR3 must point to valid page tables that will be used once the transition
+ is complete, and those page tables must guarantee that the pages for this
+ function and the stack are identity mapped.
+
+ @param EntryPoint A pointer to function to call with the new stack after
+ paging is enabled.
+ @param Context1 A pointer to the context to pass into the EntryPoint
+ function as the first parameter after paging is enabled.
+ @param Context2 A pointer to the context to pass into the EntryPoint
+ function as the second parameter after paging is enabled.
+ @param NewStack A pointer to the new stack to use for the EntryPoint
+ function after paging is enabled.
+
+**/
VOID
EFIAPI
InternalX86EnablePaging32 (
@@ -25,9 +58,42 @@ InternalX86EnablePaging32 ( IN VOID *NewStack
)
{
+ //
+ // This function cannot work on X64 platform
+ //
ASSERT (FALSE);
}
+/**
+ Disables the 32-bit paging mode on the CPU.
+
+ Disables the 32-bit paging mode on the CPU and returns to 32-bit protected
+ mode. This function assumes the current execution mode is 32-paged protected
+ mode. This function is only available on IA-32. After the 32-bit paging mode
+ is disabled, control is transferred to the function specified by EntryPoint
+ using the new stack specified by NewStack and passing in the parameters
+ specified by Context1 and Context2. Context1 and Context2 are optional and
+ may be NULL. The function EntryPoint must never return.
+
+ There are a number of constraints that must be followed before calling this
+ function:
+ 1) Interrupts must be disabled.
+ 2) The caller must be in 32-bit paged mode.
+ 3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode.
+ 4) CR3 must point to valid page tables that guarantee that the pages for
+ this function and the stack are identity mapped.
+
+ @param EntryPoint A pointer to function to call with the new stack after
+ paging is disabled.
+ @param Context1 A pointer to the context to pass into the EntryPoint
+ function as the first parameter after paging is disabled.
+ @param Context2 A pointer to the context to pass into the EntryPoint
+ function as the second parameter after paging is
+ disabled.
+ @param NewStack A pointer to the new stack to use for the EntryPoint
+ function after paging is disabled.
+
+**/
VOID
EFIAPI
InternalX86DisablePaging32 (
@@ -37,9 +103,39 @@ InternalX86DisablePaging32 ( IN VOID *NewStack
)
{
+ //
+ // This function cannot work on X64 platform
+ //
ASSERT (FALSE);
}
+/**
+ Enables the 64-bit paging mode on the CPU.
+
+ Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables
+ must be properly initialized prior to calling this service. This function
+ assumes the current execution mode is 32-bit protected mode with flat
+ descriptors. This function is only available on IA-32. After the 64-bit
+ paging mode is enabled, control is transferred to the function specified by
+ EntryPoint using the new stack specified by NewStack and passing in the
+ parameters specified by Context1 and Context2. Context1 and Context2 are
+ optional and may be 0. The function EntryPoint must never return.
+
+ @param Cs The 16-bit selector to load in the CS before EntryPoint
+ is called. The descriptor in the GDT that this selector
+ references must be setup for long mode.
+ @param EntryPoint The 64-bit virtual address of the function to call with
+ the new stack after paging is enabled.
+ @param Context1 The 64-bit virtual address of the context to pass into
+ the EntryPoint function as the first parameter after
+ paging is enabled.
+ @param Context2 The 64-bit virtual address of the context to pass into
+ the EntryPoint function as the second parameter after
+ paging is enabled.
+ @param NewStack The 64-bit virtual address of the new stack to use for
+ the EntryPoint function after paging is enabled.
+
+**/
VOID
EFIAPI
InternalX86EnablePaging64 (
@@ -50,5 +146,8 @@ InternalX86EnablePaging64 ( IN UINT64 NewStack
)
{
+ //
+ // This function cannot work on X64 platform
+ //
ASSERT (FALSE);
}
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