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Author SHA1 Message Date
Reto Buerki
b75b1902f2 hw_x86_64: Provide inb and outb functions for port I/O 
The port_io.h file provides the inb and outb functions to perform port
I/O operations.
 2015-03-27 11:53:30 +01:00
Reto Buerki
1b3871a3f0 hw_x86_64: Move exception_entry to 0xffff0000 
The location in memory is arbitrary but we use the same address as the
ARM architecture. Adjust references to virtual addresses in the mode
transition pages to cope with 64-bit values.
 2015-03-27 11:53:30 +01:00
Reto Buerki
147b1ec2b1 hw_x86_64: Adjust parameter type of Message_tpl::prepare_send 
Change the type of the local name parameter from unsigned to unsigned
long. Otherwise only 4 bytes are copied on x86_64, leaving 4 bytes of
garbage.
 2015-03-27 11:53:29 +01:00
Reto Buerki
16a51b317a hw_x86_64: Implement Cpu_idle::Cpu_idle function 
The function is a copy of the ARM version.
 2015-03-27 11:53:29 +01:00
Reto Buerki
2ecdf4f729 hw_x86_64: Forward interrupts to _interrupt function 
Extend the Thread::exception function to forward external interrupts to
the _interrupt function for processing.
 2015-03-27 11:53:29 +01:00
Reto Buerki
d0024e1893 hw_x86_64: Fill _fault_addr from cr2 in _mmu_exception 
Use the Cpu::Cr2 register to read the linear page fault address in the
Thread::_mmu_exception function.
 2015-03-27 11:53:29 +01:00
Reto Buerki
d553d38ecf hw_x86_64: Model cr2 register in CPU state 
Make the cr2 control register accessible in the Cpu class. The register
is needed to retrieve the linear address that caused a page fault.
 2015-03-27 11:53:29 +01:00
Reto Buerki
466ad3aed4 hw_x86_64: Implement Thread::_mmu_exception() for x86_64 
The function is a copy of the ARM version minus the in_fault
distinction.
 2015-03-27 11:53:29 +01:00
Reto Buerki
0992c233bd hw_x86_64: Forward page faults to the _mmu_exception function 2015-03-27 11:53:28 +01:00
Reto Buerki
112ff2609a hw_x86_64: Add Thread::_event implementation 
It is an exact copy of the ARM version.
 2015-03-27 11:53:28 +01:00
Reto Buerki
83a1b826a3 hw_x86_64: Add supervisor call handling to Thread::exception 
Forward supervisor calls to the Thread::_call function for dispatching.
 2015-03-27 11:53:28 +01:00
Reto Buerki
0568dcc875 hw_x86_64: Implement Thread::_reg function 2015-03-27 11:53:28 +01:00
Reto Buerki
e5be376f57 hw_x86_64: Declare Thread_reg_id enum for x86_64 
Only define IDs of registers which are actually accessed by threads.
 2015-03-27 11:53:28 +01:00
Reto Buerki
472c3b6502 hw_x86_64: Use mtc relative addressing for master context 2015-03-27 11:53:28 +01:00
Reto Buerki
080d7d5f8b hw_x86_64: Use mtc relative addressing for _mt_buffer in crt0.s 
Until the kernel page tables are active, labels can't be used directly
because the associated pages are not mapped for non-core threads.
 2015-03-27 11:53:28 +01:00
Reto Buerki
09c90e5751 hw_x86_64: Set interrupt stack in Tss::Setup 2015-03-27 11:53:27 +01:00
Reto Buerki
9af9dcc02c hw_x86_64: Reserve space for interrupt stack in mtc region 
The interrupt stack must reside in the mtc region in order to use it for
non-core threads. The size of the stack is set to 56 bytes in order to
hold the interrupt stack frame plus the additional vector number that is
pushed onto the stack by the ISR.
 2015-03-27 11:53:27 +01:00
Reto Buerki
9c44d32dd9 hw_x86_64: Add virt_base paramater to Tss::setup function 
The stack pointers (RSP) for privilege levels 0-2 must be setup using an
address in the mtc region to make stack switching work for non-core
threads.
 2015-03-27 11:53:27 +01:00
Reto Buerki
15d131b723 hw_x86_64: Use _virt_mtc_addr to calculate ISR base 
Call the _virt_mtc_addr function with the _mt_isrs label to calculate
the ISR base address in Idt::setup. Again, assume the address to be
below 0x10000.
 2015-03-27 11:53:27 +01:00
Reto Buerki
a5efe04656 hw_x86_64: Add virt_base paramater to Idt::setup function 
Use parameter instead of class member variable because it would get
stored into the mtc region otherwise. In a further iteration only the
actual IDT should be saved into the mtc, not the complete class
instance. Currently the class instance size is equal to the IDT table
size.
 2015-03-27 11:53:27 +01:00
Reto Buerki
1102b2b562 hw_x86_64: Calculate limit using _mt_gdt_end in Gdt::load 2015-03-27 11:53:27 +01:00
Reto Buerki
6f5ea78a51 hw_x86_64: Prefix gdt labels with _mt 
Streamline the naming by prepending the _mt prefix to the gdt labels.
 2015-03-27 11:53:26 +01:00
Reto Buerki
69e820e4e3 hw_x86_64: Reload GDTR in Genode::Cpu::init_thread 
The GDT reload must happen after the page tables mapping the mtc region
is active, that's why it cannot be done in the Genode::Cpu ctor.
 2015-03-27 11:53:26 +01:00
Reto Buerki
968ab15bbb hw_x86_64: Add Genode::Gdt class 
The class provides the load() function which reloads the GDTR with the
GDT address in the mtc region. This is needed to make the segments
accessible to non-core threads.

Make the _gdt_start label global to use it in the call to
_virt_mtc_addr().
 2015-03-27 11:53:26 +01:00
Reto Buerki
251b270e4b hw_x86_64: Factor out _virt_mtc_addr to mtc_util.h header 2015-03-27 11:53:26 +01:00
Reto Buerki
cfe89996e8 hw_x86_64: Factor out pseudo descriptor class to own header 2015-03-27 11:53:26 +01:00
Reto Buerki
d0f14cb941 hw_x86_64: Use _mt_tss and _mt_begin labels to set TSS base 
The TSS descriptor base address is assumed to be below the 0x10000 mark
(only bits 0-15 used) for now.
 2015-03-27 11:53:26 +01:00
Reto Buerki
00921e4a5c hw_x86_64: Create Tss instance in mtc region 
Use the _mt_tss label and the placement new operator to create the
Tss class instance in the mtc region. Update the hard-coded
TSS base address to use the virtual mtc address.
 2015-03-27 11:53:25 +01:00
Reto Buerki
b9fe4a8d48 hw_x86_64: Reserve space for TSS in mtc region 2015-03-27 11:53:25 +01:00
Reto Buerki
34a25d3160 hw_x86_64: Make Tss member functions non-static 
Add appropriate Tss object to Genode::Cpu class.
 2015-03-27 11:53:25 +01:00
Reto Buerki
ec028ea06f hw_x86_64: Move GDT into mtc region 
The GDT must be visible for non-core threads too.
 2015-03-27 11:53:25 +01:00
Reto Buerki
bf5118fe54 hw_x86_64: Make _virt_idt_addr member more generic 
Add label argument to function and rename it to _virt_mtc_addr. It can
be used to retrieve the virtual mtc address of any given label.
 2015-03-27 11:53:25 +01:00
Reto Buerki
b8e2249f51 hw_x86_64: Use _virt_idt_addr member in Idt::load 
Load the virtual address in the mode transition pages into Interrupt
Descriptor Table Register (IDTR).
 2015-03-27 11:53:25 +01:00
Reto Buerki
9c2d071654 hw_x86_64: Add virt_base argument to Idt::load 
The argument specifies the virtual base address of the mode transition
pages.
 2015-03-27 11:53:24 +01:00
Reto Buerki
ecaad9ecce hw_x86_64: Add private _virt_idt_address member to Idt class 
This function calculates the address of the IDT for a given virtual
mode transition base address.
 2015-03-27 11:53:24 +01:00
Reto Buerki
89add00518 hw_x86_64: Create Idt instance in mtc region 
Use the _mt_idt label and the placement new operator to create the Idt
instance in the mtc region.
 2015-03-27 11:53:24 +01:00
Reto Buerki
9c8109c276 hw_x86_64: Reserve space for IDT on mode transition pages 
On exception, the CPU first checks the IDT in order to find the
associated ISR. The IDT must therefore be placed in the mode transition
pages to make them available for non-core threads.
 2015-03-27 11:53:24 +01:00
Reto Buerki
d8a10448bb hw_x86_64: Make Idt member functions non-static 
Add appropriate Idt object to Genode::Cpu class. Update the hard-coded
TSS base address.
 2015-03-27 11:53:24 +01:00
Reto Buerki
e3332c6c53 hw_x86_64: Drop obsolete isr.s assembly file 2015-03-27 11:53:24 +01:00
Reto Buerki
a361fbd2bc hw_x86_64: Move ISR entries to mode transition page 
This is needed to make them available for non-core threads which
initially only have the mode transition page mapped.
 2015-03-27 11:53:23 +01:00
Reto Buerki
d1a4eaed0d hw_x86_64: Add fake Timer::ms_to_tics implementation 
This makes the scheduler happy and it starts scheduling threads.
 2015-03-27 11:53:23 +01:00
Adrian-Ken Rueegsegger
4946f21302 hw_x86_64: Set base address and limit of TSS descriptor 
The limit is set to match the TSS size - 1 and the base address is
hardcoded to the *current* address of the TSS instance (0x3a1100).

TODO: Set the base address using the 'tss' label. If the TSS descriptor
      format were not so utterly unusable this would be straightforward.
      Changes to the code that indirectly lead to a different location
      of the tss result in #GP since the base address will be invalid.
 2015-03-27 11:53:23 +01:00
Adrian-Ken Rueegsegger
58e5f9b2fe hw_x86_64: Jump to actual kernel entry on interrupt 2015-03-27 11:53:23 +01:00
Adrian-Ken Rueegsegger
9f825ffb17 hw_x86_64: Setup and load Task State Segment 2015-03-27 11:53:23 +01:00
Adrian-Ken Rueegsegger
2af5aaa54d hw_x86_64: Add Tss class 
The class Genode::Tss represents a 64-bit Task State Segment (TSS) as
specified by Intel SDM Vol. 3A, section 7.7.

The setup function sets the stack pointers for privilege levels 0-2 to
the kernel stack address. The load function loads the TSS segment
selector into the task register.
 2015-03-27 11:53:23 +01:00
Adrian-Ken Rueegsegger
793b5264e3 hw_x86_64: Set dpl of syscall IDT entry to 3 
Since this IDT entry is called from usermode the descriptor privilege
level must be 3.
 2015-03-27 11:53:22 +01:00
Adrian-Ken Rueegsegger
ed06c46233 hw_x86_64: Specify user argument to register mapping 
Implement user argument setter and getter support functions. The mapping of
the state registers corresponds to the system call parameter passing
convention.
 2015-03-27 11:53:22 +01:00
Adrian-Ken Rueegsegger
16a15237a4 hw_x86_64: Continue execution of the kernel 
The instruction pointer is the first field of the master context and can
directly be used as a jump argument, which avoids additional register
copy operations.
 2015-03-27 11:53:22 +01:00
Adrian-Ken Rueegsegger
ecfb954eb9 hw_x86_64: Restore kernel stack pointer 2015-03-27 11:53:22 +01:00
Adrian-Ken Rueegsegger
c62b4ea36a hw_x86_64: Restore kernel register values from master context 
Set stack pointer to master context and restore kernel register by popping
the values from the master context.
 2015-03-27 11:53:22 +01:00