From 4d946f7970e51d80f8358e0a619dfb17d89e0920 Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Mon, 19 Oct 2015 10:25:56 +0800 Subject: ACPI: Enable build of AML interpreter debugger This patch enables ACPICA debugger files using a configurable CONFIG_ACPI_DEBUGGER configuration item. Those debugger related code that was originally masked as ACPI_FUTURE_USAGE now gets unmasked. Necessary OSL stubs are also added in this patch: 1. acpi_os_readable(): This should be arch specific in Linux, while this patch doesn't introduce real implementation and a complex mechanism to allow architecture specific acpi_os_readable() to be implemented to validate the address. It may be done by future commits. 2. acpi_os_get_line(): This is used to obtain debugger command input. This patch only introduces a simple KDB concept example in it and the example should be co-working with the code implemented in acpi_os_printf(). Since this KDB example won't be compiled unless ENABLE_DEBUGGER is defined and it seems Linux has already stopped to use ENABLE_DEBUGGER, thus do not expect it can work properly. This patch also cleans up all other ACPI_FUTURE_USAGE surroundings accordingly. 1. Since linkage error can be automatically detected, declaration in the headers needn't be surrounded by ACPI_FUTURE_USAGE. So only the following separate exported fuction bodies are masked by this macro (other exported fucntions may have already been masked at entire module level via drivers/acpi/acpica/Makefile): acpi_install_exception_handler() acpi_subsystem_status() acpi_get_system_info() acpi_get_statistics() acpi_install_initialization_handler() 2. Since strip can automatically zap the no-user functions, functions that are not marked with ACPI_EXPORT_SYMBOL() needn't get surrounded by ACPI_FUTURE_USAGE. So the following function which is not used by Linux kernel now won't get surrounded by this macro: acpi_ps_get_name() Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki --- drivers/acpi/osl.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) (limited to 'drivers/acpi/osl.c') diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 739a4a6b3b9b..327291586f84 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -66,8 +66,6 @@ struct acpi_os_dpc { /* stuff for debugger support */ int acpi_in_debugger; EXPORT_SYMBOL(acpi_in_debugger); - -extern char line_buf[80]; #endif /*ENABLE_DEBUGGER */ static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, @@ -1345,15 +1343,13 @@ acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) return AE_OK; } -#ifdef ACPI_FUTURE_USAGE -u32 acpi_os_get_line(char *buffer) +acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) { - #ifdef ENABLE_DEBUGGER if (acpi_in_debugger) { u32 chars; - kdb_read(buffer, sizeof(line_buf)); + kdb_read(buffer, buffer_length); /* remove the CR kdb includes */ chars = strlen(buffer) - 1; @@ -1361,9 +1357,8 @@ u32 acpi_os_get_line(char *buffer) } #endif - return 0; + return AE_OK; } -#endif /* ACPI_FUTURE_USAGE */ acpi_status acpi_os_signal(u32 function, void *info) { -- cgit